diff --git a/google/cloud/dialogflow_v2/proto/agent.proto b/google/cloud/dialogflow_v2/proto/agent.proto
deleted file mode 100644
index 72ff1b336..000000000
--- a/google/cloud/dialogflow_v2/proto/agent.proto
+++ /dev/null
@@ -1,493 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/validation_result.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "AgentProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [Agents][google.cloud.dialogflow.v2.Agent].
-service Agents {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Retrieves the specified agent.
-  rpc GetAgent(GetAgentRequest) returns (Agent) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/agent"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/agent"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Creates/updates the specified agent.
-  rpc SetAgent(SetAgentRequest) returns (Agent) {
-    option (google.api.http) = {
-      post: "/v2/{agent.parent=projects/*}/agent"
-      body: "agent"
-      additional_bindings {
-        post: "/v2/{agent.parent=projects/*/locations/*}/agent"
-        body: "agent"
-      }
-    };
-    option (google.api.method_signature) = "agent";
-  }
-
-  // Deletes the specified agent.
-  rpc DeleteAgent(DeleteAgentRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{parent=projects/*}/agent"
-      additional_bindings {
-        delete: "/v2/{parent=projects/*/locations/*}/agent"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Returns the list of agents.
-  //
-  // Since there is at most one conversational agent per project, this method is
-  // useful primarily for listing all agents across projects the caller has
-  // access to. One can achieve that with a wildcard project collection id "-".
-  // Refer to [List
-  // Sub-Collections](https://cloud.google.com/apis/design/design_patterns#list_sub-collections).
-  rpc SearchAgents(SearchAgentsRequest) returns (SearchAgentsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/agent:search"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/agent:search"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Trains the specified agent.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc TrainAgent(TrainAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/agent:train"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/agent:train"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Exports the specified agent to a ZIP file.
-  //
-  // Operation <response: [ExportAgentResponse][google.cloud.dialogflow.v2.ExportAgentResponse]>
-  rpc ExportAgent(ExportAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/agent:export"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/agent:export"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.cloud.dialogflow.v2.ExportAgentResponse"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Imports the specified agent from a ZIP file.
-  //
-  // Uploads new intents and entity types without deleting the existing ones.
-  // Intents and entity types with the same name are replaced with the new
-  // versions from [ImportAgentRequest][google.cloud.dialogflow.v2.ImportAgentRequest]. After the import, the imported draft
-  // agent will be trained automatically (unless disabled in agent settings).
-  // However, once the import is done, training may not be completed yet. Please
-  // call [TrainAgent][google.cloud.dialogflow.v2.Agents.TrainAgent] and wait for the operation it returns in order to train
-  // explicitly.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  // An operation which tracks when importing is complete. It only tracks
-  // when the draft agent is updated not when it is done training.
-  rpc ImportAgent(ImportAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/agent:import"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/agent:import"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Restores the specified agent from a ZIP file.
-  //
-  // Replaces the current agent version with a new one. All the intents and
-  // entity types in the older version are deleted. After the restore, the
-  // restored draft agent will be trained automatically (unless disabled in
-  // agent settings). However, once the restore is done, training may not be
-  // completed yet. Please call [TrainAgent][google.cloud.dialogflow.v2.Agents.TrainAgent] and wait for the operation it
-  // returns in order to train explicitly.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  // An operation which tracks when restoring is complete. It only tracks
-  // when the draft agent is updated not when it is done training.
-  rpc RestoreAgent(RestoreAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/agent:restore"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/agent:restore"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Gets agent validation result. Agent validation is performed during
-  // training time and is updated automatically when training is completed.
-  rpc GetValidationResult(GetValidationResultRequest) returns (ValidationResult) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/agent/validationResult"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/agent/validationResult"
-      }
-    };
-  }
-}
-
-// A Dialogflow agent is a virtual agent that handles conversations with your
-// end-users. It is a natural language understanding module that understands the
-// nuances of human language. Dialogflow translates end-user text or audio
-// during a conversation to structured data that your apps and services can
-// understand. You design and build a Dialogflow agent to handle the types of
-// conversations required for your system.
-//
-// For more information about agents, see the
-// [Agent guide](https://cloud.google.com/dialogflow/docs/agents-overview).
-message Agent {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Agent"
-    pattern: "projects/{project}/agent"
-  };
-
-  // Match mode determines how intents are detected from user queries.
-  enum MatchMode {
-    // Not specified.
-    MATCH_MODE_UNSPECIFIED = 0;
-
-    // Best for agents with a small number of examples in intents and/or wide
-    // use of templates syntax and composite entities.
-    MATCH_MODE_HYBRID = 1;
-
-    // Can be used for agents with a large number of examples in intents,
-    // especially the ones using @sys.any or very large custom entities.
-    MATCH_MODE_ML_ONLY = 2;
-  }
-
-  // API version for the agent.
-  enum ApiVersion {
-    // Not specified.
-    API_VERSION_UNSPECIFIED = 0;
-
-    // Legacy V1 API.
-    API_VERSION_V1 = 1;
-
-    // V2 API.
-    API_VERSION_V2 = 2;
-
-    // V2beta1 API.
-    API_VERSION_V2_BETA_1 = 3;
-  }
-
-  // Represents the agent tier.
-  enum Tier {
-    // Not specified. This value should never be used.
-    TIER_UNSPECIFIED = 0;
-
-    // Standard tier.
-    TIER_STANDARD = 1;
-
-    // Enterprise tier (Essentials).
-    TIER_ENTERPRISE = 2;
-
-    // Enterprise tier (Plus).
-    TIER_ENTERPRISE_PLUS = 3;
-  }
-
-  // Required. The project of this agent.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "cloudresourcemanager.googleapis.com/Project"
-    }
-  ];
-
-  // Required. The name of this agent.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The default language of the agent as a language tag. See
-  // [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. This field cannot be
-  // set by the `Update` method.
-  string default_language_code = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The list of all languages supported by this agent (except for the
-  // `default_language_code`).
-  repeated string supported_language_codes = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. The time zone of this agent from the
-  // [time zone database](https://www.iana.org/time-zones), e.g.,
-  // America/New_York, Europe/Paris.
-  string time_zone = 5 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The description of this agent.
-  // The maximum length is 500 characters. If exceeded, the request is rejected.
-  string description = 6 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The URI of the agent's avatar.
-  // Avatars are used throughout the Dialogflow console and in the self-hosted
-  // [Web
-  // Demo](https://cloud.google.com/dialogflow/docs/integrations/web-demo)
-  // integration.
-  string avatar_uri = 7 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Determines whether this agent should log conversation queries.
-  bool enable_logging = 8 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Determines how intents are detected from user queries.
-  MatchMode match_mode = 9 [
-    deprecated = true,
-    (google.api.field_behavior) = OPTIONAL
-  ];
-
-  // Optional. To filter out false positive results and still get variety in
-  // matched natural language inputs for your agent, you can tune the machine
-  // learning classification threshold. If the returned score value is less than
-  // the threshold value, then a fallback intent will be triggered or, if there
-  // are no fallback intents defined, no intent will be triggered. The score
-  // values range from 0.0 (completely uncertain) to 1.0 (completely certain).
-  // If set to 0.0, the default of 0.3 is used.
-  float classification_threshold = 10 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. API version displayed in Dialogflow console. If not specified,
-  // V2 API is assumed. Clients are free to query different service endpoints
-  // for different API versions. However, bots connectors and webhook calls will
-  // follow the specified API version.
-  ApiVersion api_version = 14 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The agent tier. If not specified, TIER_STANDARD is assumed.
-  Tier tier = 15 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Agents.GetAgent][google.cloud.dialogflow.v2.Agents.GetAgent].
-message GetAgentRequest {
-  // Required. The project that the agent to fetch is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// The request message for [Agents.SetAgent][google.cloud.dialogflow.v2.Agents.SetAgent].
-message SetAgentRequest {
-  // Required. The agent to update.
-  Agent agent = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Agents.DeleteAgent][google.cloud.dialogflow.v2.Agents.DeleteAgent].
-message DeleteAgentRequest {
-  // Required. The project that the agent to delete is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// The request message for [Agents.SearchAgents][google.cloud.dialogflow.v2.Agents.SearchAgents].
-message SearchAgentsRequest {
-  // Required. The project to list agents from.
-  // Format: `projects/<Project ID or '-'>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for [Agents.SearchAgents][google.cloud.dialogflow.v2.Agents.SearchAgents].
-message SearchAgentsResponse {
-  // The list of agents. There will be a maximum number of items returned based
-  // on the page_size field in the request.
-  repeated Agent agents = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Agents.TrainAgent][google.cloud.dialogflow.v2.Agents.TrainAgent].
-message TrainAgentRequest {
-  // Required. The project that the agent to train is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// The request message for [Agents.ExportAgent][google.cloud.dialogflow.v2.Agents.ExportAgent].
-message ExportAgentRequest {
-  // Required. The project that the agent to export is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Required. The [Google Cloud Storage](https://cloud.google.com/storage/docs/)
-  // URI to export the agent to.
-  // The format of this URI must be `gs://<bucket-name>/<object-name>`.
-  // If left unspecified, the serialized agent is returned inline.
-  string agent_uri = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The response message for [Agents.ExportAgent][google.cloud.dialogflow.v2.Agents.ExportAgent].
-message ExportAgentResponse {
-  // The exported agent.
-  oneof agent {
-    // The URI to a file containing the exported agent. This field is populated
-    // only if `agent_uri` is specified in `ExportAgentRequest`.
-    string agent_uri = 1;
-
-    // Zip compressed raw byte content for agent.
-    bytes agent_content = 2;
-  }
-}
-
-// The request message for [Agents.ImportAgent][google.cloud.dialogflow.v2.Agents.ImportAgent].
-message ImportAgentRequest {
-  // Required. The project that the agent to import is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Required. The agent to import.
-  oneof agent {
-    // The URI to a Google Cloud Storage file containing the agent to import.
-    // Note: The URI must start with "gs://".
-    string agent_uri = 2;
-
-    // Zip compressed raw byte content for agent.
-    bytes agent_content = 3;
-  }
-}
-
-// The request message for [Agents.RestoreAgent][google.cloud.dialogflow.v2.Agents.RestoreAgent].
-message RestoreAgentRequest {
-  // Required. The project that the agent to restore is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Required. The agent to restore.
-  oneof agent {
-    // The URI to a Google Cloud Storage file containing the agent to restore.
-    // Note: The URI must start with "gs://".
-    string agent_uri = 2;
-
-    // Zip compressed raw byte content for agent.
-    bytes agent_content = 3;
-  }
-}
-
-// The request message for [Agents.GetValidationResult][google.cloud.dialogflow.v2.Agents.GetValidationResult].
-message GetValidationResultRequest {
-  // Required. The project that the agent is associated with.
-  // Format: `projects/<Project ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Optional. The language for which you want a validation result. If not
-  // specified, the agent's default language is used. [Many
-  // languages](https://cloud.google.com/dialogflow/docs/reference/language)
-  // are supported. Note: languages must be enabled in the agent before they can
-  // be used.
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
diff --git a/google/cloud/dialogflow_v2/proto/answer_record.proto b/google/cloud/dialogflow_v2/proto/answer_record.proto
deleted file mode 100644
index 3fb729107..000000000
--- a/google/cloud/dialogflow_v2/proto/answer_record.proto
+++ /dev/null
@@ -1,306 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/participant.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "AnswerRecordsProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing
-// [AnswerRecords][google.cloud.dialogflow.v2.AnswerRecord].
-service AnswerRecords {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all answer records in the specified project in reverse
-  // chronological order.
-  rpc ListAnswerRecords(ListAnswerRecordsRequest)
-      returns (ListAnswerRecordsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/answerRecords"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/answerRecords"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Updates the specified answer record.
-  rpc UpdateAnswerRecord(UpdateAnswerRecordRequest) returns (AnswerRecord) {
-    option (google.api.http) = {
-      patch: "/v2/{answer_record.name=projects/*/answerRecords/*}"
-      body: "answer_record"
-      additional_bindings {
-        patch: "/v2/{answer_record.name=projects/*/locations/*/answerRecords/*}"
-        body: "answer_record"
-      }
-    };
-    option (google.api.method_signature) = "answer_record,update_mask";
-  }
-}
-
-// Answer records are records to manage answer history and feedbacks for
-// Dialogflow.
-//
-// Currently, answer record includes:
-//
-// - human agent assistant article suggestion
-// - human agent assistant faq article
-//
-// It doesn't include:
-//
-// - `DetectIntent` intent matching
-// - `DetectIntent` knowledge
-//
-// Answer records are not related to the conversation history in the
-// Dialogflow Console. A Record is generated even when the end-user disables
-// conversation history in the console. Records are created when there's a human
-// agent assistant suggestion generated.
-//
-// A typical workflow for customers provide feedback to an answer is:
-//
-// 1. For human agent assistant, customers get suggestion via ListSuggestions
-//    API. Together with the answers,
-//    [AnswerRecord.name][google.cloud.dialogflow.v2.AnswerRecord.name] are
-//    returned to the customers.
-// 2. The customer uses the
-// [AnswerRecord.name][google.cloud.dialogflow.v2.AnswerRecord.name] to call the
-//    [UpdateAnswerRecord][] method to send feedback about a specific answer
-//    that they believe is wrong.
-message AnswerRecord {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/AnswerRecord"
-    pattern: "projects/{project}/answerRecords/{answer_record}"
-    pattern: "projects/{project}/locations/{location}/answerRecords/{answer_record}"
-  };
-
-  // The unique identifier of this answer record.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/answerRecords/<Answer Record ID>`.
-  string name = 1;
-
-  // Required. The AnswerFeedback for this record. You can set this with
-  // [AnswerRecords.UpdateAnswerRecord][google.cloud.dialogflow.v2.AnswerRecords.UpdateAnswerRecord]
-  // in order to give us feedback about this answer.
-  AnswerFeedback answer_feedback = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // The record for this answer.
-  oneof record {
-    // Output only. The record for human agent assistant.
-    AgentAssistantRecord agent_assistant_record = 4
-        [(google.api.field_behavior) = OUTPUT_ONLY];
-  }
-}
-
-// Request message for
-// [AnswerRecords.ListAnswerRecords][google.cloud.dialogflow.v2.AnswerRecords.ListAnswerRecords].
-message ListAnswerRecordsRequest {
-  // Required. The project to list all answer records for in reverse
-  // chronological order. Format: `projects/<Project ID>/locations/<Location
-  // ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/AnswerRecord"
-    }
-  ];
-
-  // Required. Filters to restrict results to specific answer records.
-  // Filter on answer record type. Currently predicates on `type` is supported,
-  // valid values are `ARTICLE_ANSWER`, `FAQ_ANSWER`.
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The maximum number of records to return in a single page.
-  // The server may return fewer records than this. If unspecified, we use 10.
-  // The maximum is 100.
-  int32 page_size = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The
-  // [ListAnswerRecordsResponse.next_page_token][google.cloud.dialogflow.v2.ListAnswerRecordsResponse.next_page_token]
-  // value returned from a previous list request used to continue listing on
-  // the next page.
-  string page_token = 4 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Response message for
-// [AnswerRecords.ListAnswerRecords][google.cloud.dialogflow.v2.AnswerRecords.ListAnswerRecords].
-message ListAnswerRecordsResponse {
-  // The list of answer records.
-  repeated AnswerRecord answer_records = 1;
-
-  // A token to retrieve next page of results. Or empty if there are no more
-  // results.
-  // Pass this value in the
-  // [ListAnswerRecordsRequest.page_token][google.cloud.dialogflow.v2.ListAnswerRecordsRequest.page_token]
-  // field in the subsequent call to `ListAnswerRecords` method to retrieve the
-  // next page of results.
-  string next_page_token = 2;
-}
-
-// Request message for
-// [AnswerRecords.UpdateAnswerRecord][google.cloud.dialogflow.v2.AnswerRecords.UpdateAnswerRecord].
-message UpdateAnswerRecordRequest {
-  // Required. Answer record to update.
-  AnswerRecord answer_record = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2
-      [(google.api.field_behavior) = REQUIRED];
-}
-
-// Represents feedback the customer has about the quality & correctness of a
-// certain answer in a conversation.
-message AnswerFeedback {
-  // The correctness level of an answer.
-  enum CorrectnessLevel {
-    // Correctness level unspecified.
-    CORRECTNESS_LEVEL_UNSPECIFIED = 0;
-
-    // Answer is totally wrong.
-    NOT_CORRECT = 1;
-
-    // Answer is partially correct.
-    PARTIALLY_CORRECT = 2;
-
-    // Answer is fully correct.
-    FULLY_CORRECT = 3;
-  }
-
-  // The correctness level of the specific answer.
-  CorrectnessLevel correctness_level = 1;
-
-  // Normally, detail feedback is provided when answer is not fully correct.
-  oneof detail_feedback {
-    // Detail feedback of agent assist suggestions.
-    AgentAssistantFeedback agent_assistant_detail_feedback = 2;
-  }
-
-  // Indicates whether the answer/item was clicked by the human agent
-  // or not. Default to false.
-  bool clicked = 3;
-
-  // Time when the answer/item was clicked.
-  google.protobuf.Timestamp click_time = 5;
-
-  // Indicates whether the answer/item was displayed to the human
-  // agent in the agent desktop UI. Default to false.
-  bool displayed = 4;
-
-  // Time when the answer/item was displayed.
-  google.protobuf.Timestamp display_time = 6;
-}
-
-// Detail feedback of Agent Assist result.
-message AgentAssistantFeedback {
-  // Relevance of an answer.
-  enum AnswerRelevance {
-    // Answer relevance unspecified.
-    ANSWER_RELEVANCE_UNSPECIFIED = 0;
-
-    // Answer is irrelevant to query.
-    IRRELEVANT = 1;
-
-    // Answer is relevant to query.
-    RELEVANT = 2;
-  }
-
-  // Correctness of document.
-  enum DocumentCorrectness {
-    // Document correctness unspecified.
-    DOCUMENT_CORRECTNESS_UNSPECIFIED = 0;
-
-    // Information in document is incorrect.
-    INCORRECT = 1;
-
-    // Information in document is correct.
-    CORRECT = 2;
-  }
-
-  // Efficiency of document.
-  enum DocumentEfficiency {
-    // Document efficiency unspecified.
-    DOCUMENT_EFFICIENCY_UNSPECIFIED = 0;
-
-    // Document is inefficient.
-    INEFFICIENT = 1;
-
-    // Document is efficient.
-    EFFICIENT = 2;
-  }
-
-  // Optional. Whether or not the suggested answer is relevant.
-  //
-  // For example:
-  //
-  // * Query: "Can I change my mailing address?"
-  // * Suggested document says: "Items must be returned/exchanged within 60
-  //   days of the purchase date."
-  // * [answer_relevance][google.cloud.dialogflow.v2.AgentAssistantFeedback.answer_relevance]: [AnswerRelevance.IRRELEVANT][google.cloud.dialogflow.v2.AgentAssistantFeedback.AnswerRelevance.IRRELEVANT]
-  AnswerRelevance answer_relevance = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Whether or not the information in the document is correct.
-  //
-  // For example:
-  //
-  // * Query: "Can I return the package in 2 days once received?"
-  // * Suggested document says: "Items must be returned/exchanged within 60
-  //   days of the purchase date."
-  // * Ground truth: "No return or exchange is allowed."
-  // * [document_correctness]: INCORRECT
-  DocumentCorrectness document_correctness = 2
-      [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Whether or not the suggested document is efficient. For example,
-  // if the document is poorly written, hard to understand, hard to use or
-  // too long to find useful information,
-  // [document_efficiency][google.cloud.dialogflow.v2.AgentAssistantFeedback.document_efficiency]
-  // is
-  // [DocumentEfficiency.INEFFICIENT][google.cloud.dialogflow.v2.AgentAssistantFeedback.DocumentEfficiency.INEFFICIENT].
-  DocumentEfficiency document_efficiency = 3
-      [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Represents a record of a human agent assist answer.
-message AgentAssistantRecord {
-  // Output only. The agent assist answer.
-  oneof answer {
-    // Output only. The article suggestion answer.
-    ArticleAnswer article_suggestion_answer = 5
-        [(google.api.field_behavior) = OUTPUT_ONLY];
-
-    // Output only. The FAQ answer.
-    FaqAnswer faq_answer = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
-  }
-}
diff --git a/google/cloud/dialogflow_v2/proto/audio_config.proto b/google/cloud/dialogflow_v2/proto/audio_config.proto
deleted file mode 100644
index 53803f513..000000000
--- a/google/cloud/dialogflow_v2/proto/audio_config.proto
+++ /dev/null
@@ -1,372 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/duration.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "AudioConfigProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Hints for the speech recognizer to help with recognition in a specific
-// conversation state.
-message SpeechContext {
-  // Optional. A list of strings containing words and phrases that the speech
-  // recognizer should recognize with higher likelihood.
-  //
-  // This list can be used to:
-  //
-  // * improve accuracy for words and phrases you expect the user to say,
-  //   e.g. typical commands for your Dialogflow agent
-  // * add additional words to the speech recognizer vocabulary
-  // * ...
-  //
-  // See the [Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/quotas) for usage
-  // limits.
-  repeated string phrases = 1;
-
-  // Optional. Boost for this context compared to other contexts:
-  //
-  // * If the boost is positive, Dialogflow will increase the probability that
-  //   the phrases in this context are recognized over similar sounding phrases.
-  // * If the boost is unspecified or non-positive, Dialogflow will not apply
-  //   any boost.
-  //
-  // Dialogflow recommends that you use boosts in the range (0, 20] and that you
-  // find a value that fits your use case with binary search.
-  float boost = 2;
-}
-
-// Audio encoding of the audio content sent in the conversational query request.
-// Refer to the
-// [Cloud Speech API
-// documentation](https://cloud.google.com/speech-to-text/docs/basics) for more
-// details.
-enum AudioEncoding {
-  // Not specified.
-  AUDIO_ENCODING_UNSPECIFIED = 0;
-
-  // Uncompressed 16-bit signed little-endian samples (Linear PCM).
-  AUDIO_ENCODING_LINEAR_16 = 1;
-
-  // [`FLAC`](https://xiph.org/flac/documentation.html) (Free Lossless Audio
-  // Codec) is the recommended encoding because it is lossless (therefore
-  // recognition is not compromised) and requires only about half the
-  // bandwidth of `LINEAR16`. `FLAC` stream encoding supports 16-bit and
-  // 24-bit samples, however, not all fields in `STREAMINFO` are supported.
-  AUDIO_ENCODING_FLAC = 2;
-
-  // 8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.
-  AUDIO_ENCODING_MULAW = 3;
-
-  // Adaptive Multi-Rate Narrowband codec. `sample_rate_hertz` must be 8000.
-  AUDIO_ENCODING_AMR = 4;
-
-  // Adaptive Multi-Rate Wideband codec. `sample_rate_hertz` must be 16000.
-  AUDIO_ENCODING_AMR_WB = 5;
-
-  // Opus encoded audio frames in Ogg container
-  // ([OggOpus](https://wiki.xiph.org/OggOpus)).
-  // `sample_rate_hertz` must be 16000.
-  AUDIO_ENCODING_OGG_OPUS = 6;
-
-  // Although the use of lossy encodings is not recommended, if a very low
-  // bitrate encoding is required, `OGG_OPUS` is highly preferred over
-  // Speex encoding. The [Speex](https://speex.org/) encoding supported by
-  // Dialogflow API has a header byte in each block, as in MIME type
-  // `audio/x-speex-with-header-byte`.
-  // It is a variant of the RTP Speex encoding defined in
-  // [RFC 5574](https://tools.ietf.org/html/rfc5574).
-  // The stream is a sequence of blocks, one block per RTP packet. Each block
-  // starts with a byte containing the length of the block, in bytes, followed
-  // by one or more frames of Speex data, padded to an integral number of
-  // bytes (octets) as specified in RFC 5574. In other words, each RTP header
-  // is replaced with a single byte containing the block length. Only Speex
-  // wideband is supported. `sample_rate_hertz` must be 16000.
-  AUDIO_ENCODING_SPEEX_WITH_HEADER_BYTE = 7;
-}
-
-// Information for a word recognized by the speech recognizer.
-message SpeechWordInfo {
-  // The word this info is for.
-  string word = 3;
-
-  // Time offset relative to the beginning of the audio that corresponds to the
-  // start of the spoken word. This is an experimental feature and the accuracy
-  // of the time offset can vary.
-  google.protobuf.Duration start_offset = 1;
-
-  // Time offset relative to the beginning of the audio that corresponds to the
-  // end of the spoken word. This is an experimental feature and the accuracy of
-  // the time offset can vary.
-  google.protobuf.Duration end_offset = 2;
-
-  // The Speech confidence between 0.0 and 1.0 for this word. A higher number
-  // indicates an estimated greater likelihood that the recognized word is
-  // correct. The default of 0.0 is a sentinel value indicating that confidence
-  // was not set.
-  //
-  // This field is not guaranteed to be fully stable over time for the same
-  // audio input. Users should also not rely on it to always be provided.
-  float confidence = 4;
-}
-
-// Variant of the specified [Speech model][google.cloud.dialogflow.v2.InputAudioConfig.model] to use.
-//
-// See the [Cloud Speech
-// documentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)
-// for which models have different variants. For example, the "phone_call" model
-// has both a standard and an enhanced variant. When you use an enhanced model,
-// you will generally receive higher quality results than for a standard model.
-enum SpeechModelVariant {
-  // No model variant specified. In this case Dialogflow defaults to
-  // USE_BEST_AVAILABLE.
-  SPEECH_MODEL_VARIANT_UNSPECIFIED = 0;
-
-  // Use the best available variant of the [Speech
-  // model][InputAudioConfig.model] that the caller is eligible for.
-  //
-  // Please see the [Dialogflow
-  // docs](https://cloud.google.com/dialogflow/docs/data-logging) for
-  // how to make your project eligible for enhanced models.
-  USE_BEST_AVAILABLE = 1;
-
-  // Use standard model variant even if an enhanced model is available.  See the
-  // [Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)
-  // for details about enhanced models.
-  USE_STANDARD = 2;
-
-  // Use an enhanced model variant:
-  //
-  // * If an enhanced variant does not exist for the given
-  //   [model][google.cloud.dialogflow.v2.InputAudioConfig.model] and request language, Dialogflow falls
-  //   back to the standard variant.
-  //
-  //   The [Cloud Speech
-  //   documentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)
-  //   describes which models have enhanced variants.
-  //
-  // * If the API caller isn't eligible for enhanced models, Dialogflow returns
-  //   an error. Please see the [Dialogflow
-  //   docs](https://cloud.google.com/dialogflow/docs/data-logging)
-  //   for how to make your project eligible.
-  USE_ENHANCED = 3;
-}
-
-// Instructs the speech recognizer how to process the audio content.
-message InputAudioConfig {
-  // Required. Audio encoding of the audio content to process.
-  AudioEncoding audio_encoding = 1;
-
-  // Required. Sample rate (in Hertz) of the audio content sent in the query.
-  // Refer to
-  // [Cloud Speech API
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics) for
-  // more details.
-  int32 sample_rate_hertz = 2;
-
-  // Required. The language of the supplied audio. Dialogflow does not do
-  // translations. See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. Note that queries in
-  // the same session do not necessarily need to specify the same language.
-  string language_code = 3;
-
-  // If `true`, Dialogflow returns [SpeechWordInfo][google.cloud.dialogflow.v2.SpeechWordInfo] in
-  // [StreamingRecognitionResult][google.cloud.dialogflow.v2.StreamingRecognitionResult] with information about the recognized speech
-  // words, e.g. start and end time offsets. If false or unspecified, Speech
-  // doesn't return any word-level information.
-  bool enable_word_info = 13;
-
-  // A list of strings containing words and phrases that the speech
-  // recognizer should recognize with higher likelihood.
-  //
-  // See [the Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics#phrase-hints)
-  // for more details.
-  //
-  // This field is deprecated. Please use [speech_contexts]() instead. If you
-  // specify both [phrase_hints]() and [speech_contexts](), Dialogflow will
-  // treat the [phrase_hints]() as a single additional [SpeechContext]().
-  repeated string phrase_hints = 4 [deprecated = true];
-
-  // Context information to assist speech recognition.
-  //
-  // See [the Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics#phrase-hints)
-  // for more details.
-  repeated SpeechContext speech_contexts = 11;
-
-  // Which Speech model to select for the given request. Select the
-  // model best suited to your domain to get best results. If a model is not
-  // explicitly specified, then we auto-select a model based on the parameters
-  // in the InputAudioConfig.
-  // If enhanced speech model is enabled for the agent and an enhanced
-  // version of the specified model for the language does not exist, then the
-  // speech is recognized using the standard version of the specified model.
-  // Refer to
-  // [Cloud Speech API
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics#select-model)
-  // for more details.
-  string model = 7;
-
-  // Which variant of the [Speech model][google.cloud.dialogflow.v2.InputAudioConfig.model] to use.
-  SpeechModelVariant model_variant = 10;
-
-  // If `false` (default), recognition does not cease until the
-  // client closes the stream.
-  // If `true`, the recognizer will detect a single spoken utterance in input
-  // audio. Recognition ceases when it detects the audio's voice has
-  // stopped or paused. In this case, once a detected intent is received, the
-  // client should close the stream and start a new request with a new stream as
-  // needed.
-  // Note: This setting is relevant only for streaming methods.
-  // Note: When specified, InputAudioConfig.single_utterance takes precedence
-  // over StreamingDetectIntentRequest.single_utterance.
-  bool single_utterance = 8;
-
-  // Only used in [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] and
-  // [Participants.StreamingAnalyzeContent][google.cloud.dialogflow.v2.Participants.StreamingAnalyzeContent].
-  // If `false` and recognition doesn't return any result, trigger
-  // `NO_SPEECH_RECOGNIZED` event to Dialogflow agent.
-  bool disable_no_speech_recognized_event = 14;
-}
-
-// Description of which voice to use for speech synthesis.
-message VoiceSelectionParams {
-  // Optional. The name of the voice. If not set, the service will choose a
-  // voice based on the other parameters such as language_code and
-  // [ssml_gender][google.cloud.dialogflow.v2.VoiceSelectionParams.ssml_gender].
-  string name = 1;
-
-  // Optional. The preferred gender of the voice. If not set, the service will
-  // choose a voice based on the other parameters such as language_code and
-  // [name][google.cloud.dialogflow.v2.VoiceSelectionParams.name]. Note that this is only a preference, not requirement. If a
-  // voice of the appropriate gender is not available, the synthesizer should
-  // substitute a voice with a different gender rather than failing the request.
-  SsmlVoiceGender ssml_gender = 2;
-}
-
-// Configuration of how speech should be synthesized.
-message SynthesizeSpeechConfig {
-  // Optional. Speaking rate/speed, in the range [0.25, 4.0]. 1.0 is the normal
-  // native speed supported by the specific voice. 2.0 is twice as fast, and
-  // 0.5 is half as fast. If unset(0.0), defaults to the native 1.0 speed. Any
-  // other values < 0.25 or > 4.0 will return an error.
-  double speaking_rate = 1;
-
-  // Optional. Speaking pitch, in the range [-20.0, 20.0]. 20 means increase 20
-  // semitones from the original pitch. -20 means decrease 20 semitones from the
-  // original pitch.
-  double pitch = 2;
-
-  // Optional. Volume gain (in dB) of the normal native volume supported by the
-  // specific voice, in the range [-96.0, 16.0]. If unset, or set to a value of
-  // 0.0 (dB), will play at normal native signal amplitude. A value of -6.0 (dB)
-  // will play at approximately half the amplitude of the normal native signal
-  // amplitude. A value of +6.0 (dB) will play at approximately twice the
-  // amplitude of the normal native signal amplitude. We strongly recommend not
-  // to exceed +10 (dB) as there's usually no effective increase in loudness for
-  // any value greater than that.
-  double volume_gain_db = 3;
-
-  // Optional. An identifier which selects 'audio effects' profiles that are
-  // applied on (post synthesized) text to speech. Effects are applied on top of
-  // each other in the order they are given.
-  repeated string effects_profile_id = 5;
-
-  // Optional. The desired voice of the synthesized audio.
-  VoiceSelectionParams voice = 4;
-}
-
-// Gender of the voice as described in
-// [SSML voice element](https://www.w3.org/TR/speech-synthesis11/#edef_voice).
-enum SsmlVoiceGender {
-  // An unspecified gender, which means that the client doesn't care which
-  // gender the selected voice will have.
-  SSML_VOICE_GENDER_UNSPECIFIED = 0;
-
-  // A male voice.
-  SSML_VOICE_GENDER_MALE = 1;
-
-  // A female voice.
-  SSML_VOICE_GENDER_FEMALE = 2;
-
-  // A gender-neutral voice.
-  SSML_VOICE_GENDER_NEUTRAL = 3;
-}
-
-// Instructs the speech synthesizer on how to generate the output audio content.
-// If this audio config is supplied in a request, it overrides all existing
-// text-to-speech settings applied to the agent.
-message OutputAudioConfig {
-  // Required. Audio encoding of the synthesized audio content.
-  OutputAudioEncoding audio_encoding = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // The synthesis sample rate (in hertz) for this audio. If not
-  // provided, then the synthesizer will use the default sample rate based on
-  // the audio encoding. If this is different from the voice's natural sample
-  // rate, then the synthesizer will honor this request by converting to the
-  // desired sample rate (which might result in worse audio quality).
-  int32 sample_rate_hertz = 2;
-
-  // Configuration of how speech should be synthesized.
-  SynthesizeSpeechConfig synthesize_speech_config = 3;
-}
-
-// Configures speech transcription for [ConversationProfile][google.cloud.dialogflow.v2.ConversationProfile].
-message SpeechToTextConfig {
-  // Optional. The speech model used in speech to text.
-  // `SPEECH_MODEL_VARIANT_UNSPECIFIED`, `USE_BEST_AVAILABLE` will be treated as
-  // `USE_ENHANCED`. It can be overridden in [AnalyzeContentRequest][google.cloud.dialogflow.v2.AnalyzeContentRequest] and
-  // [StreamingAnalyzeContentRequest][google.cloud.dialogflow.v2.StreamingAnalyzeContentRequest] request.
-  SpeechModelVariant speech_model_variant = 1 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Audio encoding of the output audio format in Text-To-Speech.
-enum OutputAudioEncoding {
-  // Not specified.
-  OUTPUT_AUDIO_ENCODING_UNSPECIFIED = 0;
-
-  // Uncompressed 16-bit signed little-endian samples (Linear PCM).
-  // Audio content returned as LINEAR16 also contains a WAV header.
-  OUTPUT_AUDIO_ENCODING_LINEAR_16 = 1;
-
-  // MP3 audio at 32kbps.
-  OUTPUT_AUDIO_ENCODING_MP3 = 2;
-
-  // MP3 audio at 64kbps.
-  OUTPUT_AUDIO_ENCODING_MP3_64_KBPS = 4;
-
-  // Opus encoded audio wrapped in an ogg container. The result will be a
-  // file which can be played natively on Android, and in browsers (at least
-  // Chrome and Firefox). The quality of the encoding is considerably higher
-  // than MP3 while using approximately the same bitrate.
-  OUTPUT_AUDIO_ENCODING_OGG_OPUS = 3;
-
-  // 8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.
-  OUTPUT_AUDIO_ENCODING_MULAW = 5;
-}
diff --git a/google/cloud/dialogflow_v2/proto/context.proto b/google/cloud/dialogflow_v2/proto/context.proto
deleted file mode 100644
index d6a622e12..000000000
--- a/google/cloud/dialogflow_v2/proto/context.proto
+++ /dev/null
@@ -1,329 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ContextProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [Contexts][google.cloud.dialogflow.v2.Context].
-service Contexts {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all contexts in the specified session.
-  rpc ListContexts(ListContextsRequest) returns (ListContextsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/agent/sessions/*}/contexts"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent/sessions/*}/contexts"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified context.
-  rpc GetContext(GetContextRequest) returns (Context) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/agent/sessions/*/contexts/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/agent/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a context.
-  //
-  // If the specified context already exists, overrides the context.
-  rpc CreateContext(CreateContextRequest) returns (Context) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent/sessions/*}/contexts"
-      body: "context"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/agent/environments/*/users/*/sessions/*}/contexts"
-        body: "context"
-      }
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/sessions/*}/contexts"
-        body: "context"
-      }
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/contexts"
-        body: "context"
-      }
-    };
-    option (google.api.method_signature) = "parent,context";
-  }
-
-  // Updates the specified context.
-  rpc UpdateContext(UpdateContextRequest) returns (Context) {
-    option (google.api.http) = {
-      patch: "/v2/{context.name=projects/*/agent/sessions/*/contexts/*}"
-      body: "context"
-      additional_bindings {
-        patch: "/v2/{context.name=projects/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-        body: "context"
-      }
-      additional_bindings {
-        patch: "/v2/{context.name=projects/*/locations/*/agent/sessions/*/contexts/*}"
-        body: "context"
-      }
-      additional_bindings {
-        patch: "/v2/{context.name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-        body: "context"
-      }
-    };
-    option (google.api.method_signature) = "context,update_mask";
-  }
-
-  // Deletes the specified context.
-  rpc DeleteContext(DeleteContextRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/agent/sessions/*/contexts/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/agent/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Deletes all active contexts in the specified session.
-  rpc DeleteAllContexts(DeleteAllContextsRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{parent=projects/*/agent/sessions/*}/contexts"
-      additional_bindings {
-        delete: "/v2/{parent=projects/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-      additional_bindings {
-        delete: "/v2/{parent=projects/*/locations/*/agent/sessions/*}/contexts"
-      }
-      additional_bindings {
-        delete: "/v2/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-}
-
-// Dialogflow contexts are similar to natural language context. If a person says
-// to you "they are orange", you need context in order to understand what "they"
-// is referring to. Similarly, for Dialogflow to handle an end-user expression
-// like that, it needs to be provided with context in order to correctly match
-// an intent.
-//
-// Using contexts, you can control the flow of a conversation. You can configure
-// contexts for an intent by setting input and output contexts, which are
-// identified by string names. When an intent is matched, any configured output
-// contexts for that intent become active. While any contexts are active,
-// Dialogflow is more likely to match intents that are configured with input
-// contexts that correspond to the currently active contexts.
-//
-// For more information about context, see the
-// [Contexts guide](https://cloud.google.com/dialogflow/docs/contexts-overview).
-message Context {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Context"
-    pattern: "projects/{project}/agent/sessions/{session}/contexts/{context}"
-    pattern: "projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}/contexts/{context}"
-  };
-
-  // Required. The unique identifier of the context. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`,
-  // or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>/contexts/<Context ID>`.
-  //
-  // The `Context ID` is always converted to lowercase, may only contain
-  // characters in a-zA-Z0-9_-% and may be at most 250 bytes long.
-  //
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  //
-  // The following context names are reserved for internal use by Dialogflow.
-  // You should not use these contexts or create contexts with these names:
-  //
-  // * `__system_counters__`
-  // * `*_id_dialog_context`
-  // * `*_dialog_params_size`
-  string name = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The number of conversational query requests after which the
-  // context expires. The default is `0`. If set to `0`, the context expires
-  // immediately. Contexts expire automatically after 20 minutes if there
-  // are no matching queries.
-  int32 lifespan_count = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of parameters associated with this context.
-  //
-  // Depending on your protocol or client library language, this is a
-  // map, associative array, symbol table, dictionary, or JSON object
-  // composed of a collection of (MapKey, MapValue) pairs:
-  //
-  // -   MapKey type: string
-  // -   MapKey value: parameter name
-  // -   MapValue type:
-  //     -   If parameter's entity type is a composite entity: map
-  //     -   Else: depending on parameter value type, could be one of string,
-  //         number, boolean, null, list or map
-  // -   MapValue value:
-  //     -   If parameter's entity type is a composite entity:
-  //         map from composite entity property names to property values
-  //     -   Else: parameter value
-  google.protobuf.Struct parameters = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Contexts.ListContexts][google.cloud.dialogflow.v2.Contexts.ListContexts].
-message ListContextsRequest {
-  // Required. The session to list all contexts from.
-  // Format: `projects/<Project ID>/agent/sessions/<Session ID>` or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Contexts.ListContexts][google.cloud.dialogflow.v2.Contexts.ListContexts].
-message ListContextsResponse {
-  // The list of contexts. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Context contexts = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Contexts.GetContext][google.cloud.dialogflow.v2.Contexts.GetContext].
-message GetContextRequest {
-  // Required. The name of the context. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`
-  // or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>/contexts/<Context ID>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-}
-
-// The request message for [Contexts.CreateContext][google.cloud.dialogflow.v2.Contexts.CreateContext].
-message CreateContextRequest {
-  // Required. The session to create a context for.
-  // Format: `projects/<Project ID>/agent/sessions/<Session ID>` or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-
-  // Required. The context to create.
-  Context context = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Contexts.UpdateContext][google.cloud.dialogflow.v2.Contexts.UpdateContext].
-message UpdateContextRequest {
-  // Required. The context to update.
-  Context context = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Contexts.DeleteContext][google.cloud.dialogflow.v2.Contexts.DeleteContext].
-message DeleteContextRequest {
-  // Required. The name of the context to delete. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context ID>`
-  // or `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>/contexts/<Context ID>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-}
-
-// The request message for [Contexts.DeleteAllContexts][google.cloud.dialogflow.v2.Contexts.DeleteAllContexts].
-message DeleteAllContextsRequest {
-  // Required. The name of the session to delete all contexts from. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>` or `projects/<Project
-  // ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  // ID>`.
-  // If `Environment ID` is not specified we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-}
diff --git a/google/cloud/dialogflow_v2/proto/conversation.proto b/google/cloud/dialogflow_v2/proto/conversation.proto
deleted file mode 100644
index 17e062550..000000000
--- a/google/cloud/dialogflow_v2/proto/conversation.proto
+++ /dev/null
@@ -1,358 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/participant.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/timestamp.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ConversationProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [Conversations][google.cloud.dialogflow.v2.Conversation].
-service Conversations {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Creates a new conversation. Conversations are auto-completed after 24
-  // hours.
-  //
-  // Conversation Lifecycle:
-  // There are two stages during a conversation: Automated Agent Stage and
-  // Assist Stage.
-  //
-  // For Automated Agent Stage, there will be a dialogflow agent responding to
-  // user queries.
-  //
-  // For Assist Stage, there's no dialogflow agent responding to user queries.
-  // But we will provide suggestions which are generated from conversation.
-  //
-  // If [Conversation.conversation_profile][google.cloud.dialogflow.v2.Conversation.conversation_profile] is configured for a dialogflow
-  // agent, conversation will start from `Automated Agent Stage`, otherwise, it
-  // will start from `Assist Stage`. And during `Automated Agent Stage`, once an
-  // [Intent][google.cloud.dialogflow.v2.Intent] with [Intent.live_agent_handoff][google.cloud.dialogflow.v2.Intent.live_agent_handoff] is triggered, conversation
-  // will transfer to Assist Stage.
-  rpc CreateConversation(CreateConversationRequest) returns (Conversation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/conversations"
-      body: "conversation"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/conversations"
-        body: "conversation"
-      }
-    };
-    option (google.api.method_signature) = "parent,conversation";
-  }
-
-  // Returns the list of all conversations in the specified project.
-  rpc ListConversations(ListConversationsRequest) returns (ListConversationsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/conversations"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/conversations"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specific conversation.
-  rpc GetConversation(GetConversationRequest) returns (Conversation) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/conversations/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/conversations/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Completes the specified conversation. Finished conversations are purged
-  // from the database after 30 days.
-  rpc CompleteConversation(CompleteConversationRequest) returns (Conversation) {
-    option (google.api.http) = {
-      post: "/v2/{name=projects/*/conversations/*}:complete"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{name=projects/*/locations/*/conversations/*}:complete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Lists messages that belong to a given conversation.
-  // `messages` are ordered by `create_time` in descending order. To fetch
-  // updates without duplication, send request with filter
-  // `create_time_epoch_microseconds >
-  // [first item's create_time of previous request]` and empty page_token.
-  rpc ListMessages(ListMessagesRequest) returns (ListMessagesResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/conversations/*}/messages"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/conversations/*}/messages"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-}
-
-// Represents a conversation.
-// A conversation is an interaction between an agent, including live agents
-// and Dialogflow agents, and a support customer. Conversations can
-// include phone calls and text-based chat sessions.
-message Conversation {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Conversation"
-    pattern: "projects/{project}/conversations/{conversation}"
-    pattern: "projects/{project}/locations/{location}/conversations/{conversation}"
-  };
-
-  // Enumeration of the completion status of the conversation.
-  enum LifecycleState {
-    // Unknown.
-    LIFECYCLE_STATE_UNSPECIFIED = 0;
-
-    // Conversation is currently open for media analysis.
-    IN_PROGRESS = 1;
-
-    // Conversation has been completed.
-    COMPLETED = 2;
-  }
-
-  // Enumeration of the different conversation stages a conversation can be in.
-  // Reference:
-  // https://cloud.google.com/dialogflow/priv/docs/contact-center/basics#stages
-  enum ConversationStage {
-    // Unknown. Should never be used after a conversation is successfully
-    // created.
-    CONVERSATION_STAGE_UNSPECIFIED = 0;
-
-    // The conversation should return virtual agent responses into the
-    // conversation.
-    VIRTUAL_AGENT_STAGE = 1;
-
-    // The conversation should not provide responses, just listen and provide
-    // suggestions.
-    HUMAN_ASSIST_STAGE = 2;
-  }
-
-  // Output only. The unique identifier of this conversation.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The current state of the Conversation.
-  LifecycleState lifecycle_state = 2 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Required. The Conversation Profile to be used to configure this
-  // Conversation. This field cannot be updated.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string conversation_profile = 3 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-
-  // Output only. It will not be empty if the conversation is to be connected over
-  // telephony.
-  ConversationPhoneNumber phone_number = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The time the conversation was started.
-  google.protobuf.Timestamp start_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The time the conversation was finished.
-  google.protobuf.Timestamp end_time = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // The stage of a conversation. It indicates whether the virtual agent or a
-  // human agent is handling the conversation.
-  //
-  // If the conversation is created with the conversation profile that has
-  // Dialogflow config set, defaults to
-  // [ConversationStage.VIRTUAL_AGENT_STAGE][google.cloud.dialogflow.v2.Conversation.ConversationStage.VIRTUAL_AGENT_STAGE]; Otherwise, defaults to
-  // [ConversationStage.HUMAN_ASSIST_STAGE][google.cloud.dialogflow.v2.Conversation.ConversationStage.HUMAN_ASSIST_STAGE].
-  //
-  // If the conversation is created with the conversation profile that has
-  // Dialogflow config set but explicitly sets conversation_stage to
-  // [ConversationStage.HUMAN_ASSIST_STAGE][google.cloud.dialogflow.v2.Conversation.ConversationStage.HUMAN_ASSIST_STAGE], it skips
-  // [ConversationStage.VIRTUAL_AGENT_STAGE][google.cloud.dialogflow.v2.Conversation.ConversationStage.VIRTUAL_AGENT_STAGE] stage and directly goes to
-  // [ConversationStage.HUMAN_ASSIST_STAGE][google.cloud.dialogflow.v2.Conversation.ConversationStage.HUMAN_ASSIST_STAGE].
-  ConversationStage conversation_stage = 7;
-}
-
-// The request message for [Conversations.CreateConversation][google.cloud.dialogflow.v2.Conversations.CreateConversation].
-message CreateConversationRequest {
-  // Required. Resource identifier of the project creating the conversation.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-
-  // Required. The conversation to create.
-  Conversation conversation = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Identifier of the conversation. Generally it's auto generated by Google.
-  // Only set it if you cannot wait for the response to return a
-  // auto-generated one to you.
-  //
-  // The conversation ID must be compliant with the regression fomula
-  // "[a-zA-Z][a-zA-Z0-9_-]*" with the characters length in range of [3,64].
-  // If the field is provided, the caller is resposible for
-  // 1. the uniqueness of the ID, otherwise the request will be rejected.
-  // 2. the consistency for whether to use custom ID or not under a project to
-  // better ensure uniqueness.
-  string conversation_id = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Conversations.ListConversations][google.cloud.dialogflow.v2.Conversations.ListConversations].
-message ListConversationsRequest {
-  // Required. The project from which to list all conversation.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // A filter expression that filters conversations listed in the response. In
-  // general, the expression must specify the field name, a comparison operator,
-  // and the value to use for filtering:
-  // <ul>
-  //   <li>The value must be a string, a number, or a boolean.</li>
-  //   <li>The comparison operator must be either `=`,`!=`, `>`, or `<`.</li>
-  //   <li>To filter on multiple expressions, separate the
-  //       expressions with `AND` or `OR` (omitting both implies `AND`).</li>
-  //   <li>For clarity, expressions can be enclosed in parentheses.</li>
-  // </ul>
-  // Only `lifecycle_state` can be filtered on in this way. For example,
-  // the following expression only returns `COMPLETED` conversations:
-  //
-  // `lifecycle_state = "COMPLETED"`
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4;
-}
-
-// The response message for [Conversations.ListConversations][google.cloud.dialogflow.v2.Conversations.ListConversations].
-message ListConversationsResponse {
-  // The list of conversations. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Conversation conversations = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Conversations.GetConversation][google.cloud.dialogflow.v2.Conversations.GetConversation].
-message GetConversationRequest {
-  // Required. The name of the conversation. Format:
-  // `projects/<Project ID>/locations/<Location ID>/conversations/<Conversation
-  // ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-}
-
-// The request message for [Conversations.CompleteConversation][google.cloud.dialogflow.v2.Conversations.CompleteConversation].
-message CompleteConversationRequest {
-  // Required. Resource identifier of the conversation to close.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-}
-
-// The request message for [Conversations.ListMessages][google.cloud.dialogflow.v2.Conversations.ListMessages].
-message ListMessagesRequest {
-  // Required. The name of the conversation to list messages for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Message"
-    }
-  ];
-
-  // Optional. Filter on message fields. Currently predicates on `create_time`
-  // and `create_time_epoch_microseconds` are supported. `create_time` only
-  // support milliseconds accuracy. E.g.,
-  // `create_time_epoch_microseconds > 1551790877964485` or
-  // `create_time > 2017-01-15T01:30:15.01Z`.
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Conversations.ListMessages][google.cloud.dialogflow.v2.Conversations.ListMessages].
-message ListMessagesResponse {
-  // The list of messages. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  // `messages` is sorted by `create_time` in descending order.
-  repeated Message messages = 1;
-
-  // Token to retrieve the next page of results, or empty if there are
-  // no more results in the list.
-  string next_page_token = 2;
-}
-
-// Represents a phone number for telephony integration. It allows for connecting
-// a particular conversation over telephony.
-message ConversationPhoneNumber {
-  // Output only. The phone number to connect to this conversation.
-  string phone_number = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
diff --git a/google/cloud/dialogflow_v2/proto/conversation_event.proto b/google/cloud/dialogflow_v2/proto/conversation_event.proto
deleted file mode 100644
index 61cfd75f6..000000000
--- a/google/cloud/dialogflow_v2/proto/conversation_event.proto
+++ /dev/null
@@ -1,86 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/cloud/dialogflow/v2/participant.proto";
-import "google/rpc/status.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ConversationEventProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Represents a notification sent to Pub/Sub subscribers for conversation
-// lifecycle events.
-message ConversationEvent {
-  // Enumeration of the types of events available.
-  enum Type {
-    // Type not set.
-    TYPE_UNSPECIFIED = 0;
-
-    // A new conversation has been opened. This is fired when a telephone call
-    // is answered, or a conversation is created via the API.
-    CONVERSATION_STARTED = 1;
-
-    // An existing conversation has closed. This is fired when a telephone call
-    // is terminated, or a conversation is closed via the API.
-    CONVERSATION_FINISHED = 2;
-
-    // An existing conversation has received notification from Dialogflow that
-    // human intervention is required.
-    HUMAN_INTERVENTION_NEEDED = 3;
-
-    // An existing conversation has received a new message, either from API or
-    // telephony. It is configured in
-    // [ConversationProfile.new_message_event_notification_config][google.cloud.dialogflow.v2.ConversationProfile.new_message_event_notification_config]
-    NEW_MESSAGE = 5;
-
-    // Unrecoverable error during a telephone call.
-    //
-    // In general non-recoverable errors only occur if something was
-    // misconfigured in the ConversationProfile corresponding to the call. After
-    // a non-recoverable error, Dialogflow may stop responding.
-    //
-    // We don't fire this event:
-    //
-    // * in an API call because we can directly return the error, or,
-    // * when we can recover from an error.
-    UNRECOVERABLE_ERROR = 4;
-  }
-
-  // The unique identifier of the conversation this notification
-  // refers to.
-  // Format: `projects/<Project ID>/conversations/<Conversation ID>`.
-  string conversation = 1;
-
-  // The type of the event that this notification refers to.
-  Type type = 2;
-
-  // More detailed information about an error. Only set for type
-  // UNRECOVERABLE_ERROR_IN_PHONE_CALL.
-  google.rpc.Status error_status = 3;
-
-  // Payload of conversation event.
-  oneof payload {
-    // Payload of NEW_MESSAGE event.
-    Message new_message_payload = 4;
-  }
-}
diff --git a/google/cloud/dialogflow_v2/proto/conversation_profile.proto b/google/cloud/dialogflow_v2/proto/conversation_profile.proto
deleted file mode 100644
index 8194ae224..000000000
--- a/google/cloud/dialogflow_v2/proto/conversation_profile.proto
+++ /dev/null
@@ -1,574 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/audio_config.proto";
-import "google/cloud/dialogflow/v2/participant.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ConversationProfileProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [ConversationProfiles][google.cloud.dialogflow.v2.ConversationProfile].
-service ConversationProfiles {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all conversation profiles in the specified project.
-  rpc ListConversationProfiles(ListConversationProfilesRequest) returns (ListConversationProfilesResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/conversationProfiles"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/conversationProfiles"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified conversation profile.
-  rpc GetConversationProfile(GetConversationProfileRequest) returns (ConversationProfile) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/conversationProfiles/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/conversationProfiles/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a conversation profile in the specified project.
-  //
-  // [ConversationProfile.CreateTime][] and [ConversationProfile.UpdateTime][]
-  // aren't populated in the response. You can retrieve them via
-  // [GetConversationProfile][google.cloud.dialogflow.v2.ConversationProfiles.GetConversationProfile] API.
-  rpc CreateConversationProfile(CreateConversationProfileRequest) returns (ConversationProfile) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/conversationProfiles"
-      body: "conversation_profile"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/conversationProfiles"
-        body: "conversation_profile"
-      }
-    };
-    option (google.api.method_signature) = "parent,conversation_profile";
-  }
-
-  // Updates the specified conversation profile.
-  //
-  // [ConversationProfile.CreateTime][] and [ConversationProfile.UpdateTime][]
-  // aren't populated in the response. You can retrieve them via
-  // [GetConversationProfile][google.cloud.dialogflow.v2.ConversationProfiles.GetConversationProfile] API.
-  rpc UpdateConversationProfile(UpdateConversationProfileRequest) returns (ConversationProfile) {
-    option (google.api.http) = {
-      patch: "/v2/{conversation_profile.name=projects/*/conversationProfiles/*}"
-      body: "conversation_profile"
-      additional_bindings {
-        patch: "/v2/{conversation_profile.name=projects/*/locations/*/conversationProfiles/*}"
-        body: "conversation_profile"
-      }
-    };
-    option (google.api.method_signature) = "conversation_profile,update_mask";
-  }
-
-  // Deletes the specified conversation profile.
-  rpc DeleteConversationProfile(DeleteConversationProfileRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/conversationProfiles/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/conversationProfiles/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-}
-
-// Defines the services to connect to incoming Dialogflow conversations.
-message ConversationProfile {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/ConversationProfile"
-    pattern: "projects/{project}/conversationProfiles/{conversation_profile}"
-    pattern: "projects/{project}/locations/{location}/conversationProfiles/{conversation_profile}"
-  };
-
-  // Optional. The unique identifier of this conversation profile.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. Human readable name for this profile. Max length 1024 bytes.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Output only. Create time of the conversation profile.
-  google.protobuf.Timestamp create_time = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. Update time of the conversation profile.
-  google.protobuf.Timestamp update_time = 12 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Configuration for an automated agent to use with this profile.
-  AutomatedAgentConfig automated_agent_config = 3;
-
-  // Configuration for agent assistance to use with this profile.
-  HumanAgentAssistantConfig human_agent_assistant_config = 4;
-
-  // Configuration for connecting to a live agent.
-  HumanAgentHandoffConfig human_agent_handoff_config = 5;
-
-  // Configuration for publishing conversation lifecycle events.
-  NotificationConfig notification_config = 6;
-
-  // Configuration for logging conversation lifecycle events.
-  LoggingConfig logging_config = 7;
-
-  // Configuration for publishing new message events. Event will be sent in
-  // format of [ConversationEvent][google.cloud.dialogflow.v2.ConversationEvent]
-  NotificationConfig new_message_event_notification_config = 8;
-
-  // Settings for speech transcription.
-  SpeechToTextConfig stt_config = 9;
-
-  // Language which represents the conversationProfile.
-  // If unspecified, the default language code en-us applies. Users need to
-  // create a ConversationProfile for each language they want to support.
-  string language_code = 10;
-}
-
-// The request message for [ConversationProfiles.ListConversationProfiles][google.cloud.dialogflow.v2.ConversationProfiles.ListConversationProfiles].
-message ListConversationProfilesRequest {
-  // Required. The project to list all conversation profiles from.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-
-  // The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for [ConversationProfiles.ListConversationProfiles][google.cloud.dialogflow.v2.ConversationProfiles.ListConversationProfiles].
-message ListConversationProfilesResponse {
-  // The list of project conversation profiles. There is a maximum number
-  // of items returned based on the page_size field in the request.
-  repeated ConversationProfile conversation_profiles = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [ConversationProfiles.GetConversationProfile][google.cloud.dialogflow.v2.ConversationProfiles.GetConversationProfile].
-message GetConversationProfileRequest {
-  // Required. The resource name of the conversation profile.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-}
-
-// The request message for [ConversationProfiles.CreateConversationProfile][google.cloud.dialogflow.v2.ConversationProfiles.CreateConversationProfile].
-message CreateConversationProfileRequest {
-  // Required. The project to create a conversation profile for.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-
-  // Required. The conversation profile to create.
-  ConversationProfile conversation_profile = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [ConversationProfiles.UpdateConversationProfile][google.cloud.dialogflow.v2.ConversationProfiles.UpdateConversationProfile].
-message UpdateConversationProfileRequest {
-  // Required. The conversation profile to update.
-  ConversationProfile conversation_profile = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The mask to control which fields to update.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [ConversationProfiles.DeleteConversationProfile][google.cloud.dialogflow.v2.ConversationProfiles.DeleteConversationProfile].
-//
-// This operation fails if the conversation profile is still referenced from
-// a phone number.
-message DeleteConversationProfileRequest {
-  // Required. The name of the conversation profile to delete.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-}
-
-// Defines the Automated Agent to connect to a conversation.
-message AutomatedAgentConfig {
-  // Required. ID of the Dialogflow agent environment to use.
-  //
-  // This project needs to either be the same project as the conversation or you
-  // need to grant `service-<Conversation Project
-  // Number>@gcp-sa-dialogflow.iam.gserviceaccount.com` the `Dialogflow API
-  // Service Agent` role in this project.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/agent/environments/<Environment ID or '-'>`. If environment is not
-  // specified, the default `draft` environment is used. Refer to
-  // [DetectIntentRequest](/dialogflow/docs/reference/rpc/google.cloud.dialogflow.v2#google.cloud.dialogflow.v2.DetectIntentRequest)
-  // for more details.
-  string agent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// Defines the Human Agent Assist to connect to a conversation.
-message HumanAgentAssistantConfig {
-  // Settings of suggestion trigger.
-  message SuggestionTriggerSettings {
-    // Do not trigger if last utterance is small talk.
-    bool no_smalltalk = 1;
-
-    // Only trigger suggestion if participant role of last utterance is
-    // END_USER.
-    bool only_end_user = 2;
-  }
-
-  // Config for suggestion features.
-  message SuggestionFeatureConfig {
-    // The suggestion feature.
-    SuggestionFeature suggestion_feature = 5;
-
-    // Automatically iterates all participants and tries to compile
-    // suggestions.
-    //
-    // Supported features: ARTICLE_SUGGESTION, FAQ, DIALOGFLOW_ASSIST.
-    bool enable_event_based_suggestion = 3;
-
-    // Settings of suggestion trigger.
-    //
-    // Currently, only ARTICLE_SUGGESTION and FAQ will use this field.
-    SuggestionTriggerSettings suggestion_trigger_settings = 10;
-
-    // Configs of query.
-    SuggestionQueryConfig query_config = 6;
-
-    // Configs of custom conversation model.
-    ConversationModelConfig conversation_model_config = 7;
-  }
-
-  // Detail human agent assistant config.
-  message SuggestionConfig {
-    // Configuration of different suggestion features. One feature can have only
-    // one config.
-    repeated SuggestionFeatureConfig feature_configs = 2;
-
-    // If `group_suggestion_responses` is false, and there are multiple
-    // `feature_configs` in `event based suggestion` or
-    // StreamingAnalyzeContent, we will try to deliver suggestions to customers
-    // as soon as we get new suggestion. Different type of suggestions based on
-    // the same context will be in  separate Pub/Sub event or
-    // `StreamingAnalyzeContentResponse`.
-    //
-    // If `group_suggestion_responses` set to true. All the suggestions to the
-    // same participant based on the same context will be grouped into a single
-    // Pub/Sub event or StreamingAnalyzeContentResponse.
-    bool group_suggestion_responses = 3;
-  }
-
-  // Config for suggestion query.
-  message SuggestionQueryConfig {
-    // Knowledge base source settings.
-    //
-    // Supported features: ARTICLE_SUGGESTION, FAQ.
-    message KnowledgeBaseQuerySource {
-      // Required. Knowledge bases to query. Format:
-      // `projects/<Project ID>/locations/<Location
-      // ID>/knowledgeBases/<Knowledge Base ID>`. Currently, at most 5 knowledge
-      // bases are supported.
-      repeated string knowledge_bases = 1 [
-        (google.api.field_behavior) = REQUIRED,
-        (google.api.resource_reference) = {
-          type: "dialogflow.googleapis.com/KnowledgeBase"
-        }
-      ];
-    }
-
-    // Document source settings.
-    //
-    // Supported features: SMART_REPLY, SMART_COMPOSE.
-    message DocumentQuerySource {
-      // Required. Knowledge documents to query from. Format:
-      // `projects/<Project ID>/locations/<Location
-      // ID>/knowledgeBases/<KnowledgeBase ID>/documents/<Document ID>`.
-      // Currently, at most 5 documents are supported.
-      repeated string documents = 1 [
-        (google.api.field_behavior) = REQUIRED,
-        (google.api.resource_reference) = {
-          type: "dialogflow.googleapis.com/Document"
-        }
-      ];
-    }
-
-    // Dialogflow source setting.
-    //
-    // Supported feature: DIALOGFLOW_ASSIST.
-    message DialogflowQuerySource {
-      // Required. The name of a Dialogflow virtual agent used for end user side intent
-      // detection and suggestion. Format: `projects/<Project Number/
-      // ID>/locations/<Location ID>/agent`. When multiple agents are allowed in
-      // the same Dialogflow project.
-      string agent = 1 [
-        (google.api.field_behavior) = REQUIRED,
-        (google.api.resource_reference) = {
-          type: "dialogflow.googleapis.com/Agent"
-        }
-      ];
-    }
-
-    // Settings that determine how to filter recent conversation context when
-    // generating suggestions.
-    message ContextFilterSettings {
-      // If set to true, the last message from virtual agent (hand off message)
-      // and the message before it (trigger message of hand off) are dropped.
-      bool drop_handoff_messages = 1;
-
-      // If set to true, all messages from virtual agent are dropped.
-      bool drop_virtual_agent_messages = 2;
-
-      // If set to true, all messages from ivr stage are dropped.
-      bool drop_ivr_messages = 3;
-    }
-
-    // Source of query.
-    oneof query_source {
-      // Query from knowledgebase. It is used by:
-      // ARTICLE_SUGGESTION, FAQ.
-      KnowledgeBaseQuerySource knowledge_base_query_source = 1;
-
-      // Query from knowledge base document. It is used by:
-      // SMART_REPLY, SMART_COMPOSE.
-      DocumentQuerySource document_query_source = 2;
-
-      // Query from Dialogflow agent. It is used by DIALOGFLOW_ASSIST.
-      DialogflowQuerySource dialogflow_query_source = 3;
-    }
-
-    // Maximum number of results to return. Currently, if unset, defaults to 10.
-    // And the max number is 20.
-    int32 max_results = 4;
-
-    // Confidence threshold of query result.
-    //
-    // Agent Assist gives each suggestion a score in the range [0.0, 1.0], based
-    // on the relevance between the suggestion and the current conversation
-    // context. A score of 0.0 has no relevance, while a score of 1.0 has high
-    // relevance. Only suggestions with a score greater than or equal to the
-    // value of this field are included in the results.
-    //
-    // For a baseline model (the default), the recommended value is in the range
-    // [0.05, 0.1].
-    //
-    // For a custom model, there is no recommended value. Tune this value by
-    // starting from a very low value and slowly increasing until you have
-    // desired results.
-    //
-    // If this field is not set, it defaults to 0.0, which means that all
-    // suggestions are returned.
-    //
-    // Supported features: ARTICLE_SUGGESTION.
-    float confidence_threshold = 5;
-
-    // Determines how recent conversation context is filtered when generating
-    // suggestions. If unspecified, no messages will be dropped.
-    ContextFilterSettings context_filter_settings = 7;
-  }
-
-  // Custom conversation models used in agent assist feature.
-  //
-  // Supported feature: ARTICLE_SUGGESTION, SMART_COMPOSE, SMART_REPLY.
-  message ConversationModelConfig {
-    // Required. Conversation model resource name. Format: `projects/<Project
-    // ID>/conversationModels/<Model ID>`.
-    string model = 1 [
-      (google.api.field_behavior) = REQUIRED
-    ];
-  }
-
-  // Configuration for analyses to run on each conversation message.
-  message MessageAnalysisConfig {
-    // Enable entity extraction in conversation messages on [agent assist
-    // stage](https://cloud.google.com/dialogflow/priv/docs/contact-center/basics#stages).
-    // If unspecified, defaults to false.
-    bool enable_entity_extraction = 2;
-
-    // Enable sentiment analysis in conversation messages on [agent assist
-    // stage](https://cloud.google.com/dialogflow/priv/docs/contact-center/basics#stages).
-    // If unspecified, defaults to false. Sentiment analysis inspects user input
-    // and identifies the prevailing subjective opinion, especially to determine
-    // a user's attitude as positive, negative, or neutral:
-    // https://cloud.google.com/natural-language/docs/basics#sentiment_analysis
-    // For [Participants.StreamingAnalyzeContent][google.cloud.dialogflow.v2.Participants.StreamingAnalyzeContent] method, result will be in
-    // [StreamingAnalyzeContentResponse.message.SentimentAnalysisResult][google.cloud.dialogflow.v2.StreamingAnalyzeContentResponse.message].
-    // For [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] method, result will be in
-    // [AnalyzeContentResponse.message.SentimentAnalysisResult][google.cloud.dialogflow.v2.AnalyzeContentResponse.message]
-    // For [Conversations.ListMessages][google.cloud.dialogflow.v2.Conversations.ListMessages] method, result will be in
-    // [ListMessagesResponse.messages.SentimentAnalysisResult][google.cloud.dialogflow.v2.ListMessagesResponse.messages]
-    // If Pub/Sub notification is configured, result will be in
-    // [ConversationEvent.new_message_payload.SentimentAnalysisResult][google.cloud.dialogflow.v2.ConversationEvent.new_message_payload].
-    bool enable_sentiment_analysis = 3;
-  }
-
-  // Pub/Sub topic on which to publish new agent assistant events.
-  NotificationConfig notification_config = 2;
-
-  // Configuration for agent assistance of human agent participant.
-  SuggestionConfig human_agent_suggestion_config = 3;
-
-  // Configuration for agent assistance of end user participant.
-  SuggestionConfig end_user_suggestion_config = 4;
-
-  // Configuration for message analysis.
-  MessageAnalysisConfig message_analysis_config = 5;
-}
-
-// Defines the hand off to a live agent, typically on which external agent
-// service provider to connect to a conversation.
-message HumanAgentHandoffConfig {
-  // Configuration specific to LivePerson (https://www.liveperson.com).
-  message LivePersonConfig {
-    // Required. Account number of the LivePerson account to connect. This is
-    // the account number you input at the login page.
-    string account_number = 1 [(google.api.field_behavior) = REQUIRED];
-  }
-
-  // Configuration specific to Salesforce Live Agent.
-  message SalesforceLiveAgentConfig {
-    // Required. The organization ID of the Salesforce account.
-    string organization_id = 1 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. Live Agent deployment ID.
-    string deployment_id = 2 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. Live Agent chat button ID.
-    string button_id = 3 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. Domain of the Live Agent endpoint for this agent. You can find
-    // the endpoint URL in the `Live Agent settings` page. For example if URL
-    // has the form https://d.la4-c2-phx.salesforceliveagent.com/...,
-    // you should fill in d.la4-c2-phx.salesforceliveagent.com.
-    string endpoint_domain = 4 [(google.api.field_behavior) = REQUIRED];
-  }
-
-  // Required. Specifies which agent service to connect for human agent handoff.
-  oneof agent_service {
-    // Uses LivePerson (https://www.liveperson.com).
-    LivePersonConfig live_person_config = 1;
-
-    // Uses Salesforce Live Agent.
-    SalesforceLiveAgentConfig salesforce_live_agent_config = 2;
-  }
-}
-
-// Defines notification behavior.
-message NotificationConfig {
-  // Format of cloud pub/sub message.
-  enum MessageFormat {
-    // If it is unspeified, PROTO will be used.
-    MESSAGE_FORMAT_UNSPECIFIED = 0;
-
-    // Pubsub message will be serialized proto.
-    PROTO = 1;
-
-    // Pubsub message will be json.
-    JSON = 2;
-  }
-
-  // Name of the Pub/Sub topic to publish conversation
-  // events like
-  // [CONVERSATION_STARTED][google.cloud.dialogflow.v2.ConversationEvent.Type.CONVERSATION_STARTED] as
-  // serialized [ConversationEvent][google.cloud.dialogflow.v2.ConversationEvent] protos.
-  //
-  // Notification works for phone calls, if this topic either is in the same
-  // project as the conversation or you grant `service-<Conversation Project
-  // Number>@gcp-sa-dialogflow.iam.gserviceaccount.com` the `Dialogflow Service
-  // Agent` role in the topic project.
-  //
-  // Format: `projects/<Project ID>/locations/<Location ID>/topics/<Topic ID>`.
-  string topic = 1;
-
-  // Format of message.
-  MessageFormat message_format = 2;
-}
-
-// Defines logging behavior for conversation lifecycle events.
-message LoggingConfig {
-  // Whether to log conversation events like
-  // [CONVERSATION_STARTED][google.cloud.dialogflow.v2.ConversationEvent.Type.CONVERSATION_STARTED] to
-  // Stackdriver in the conversation project as JSON format
-  // [ConversationEvent][google.cloud.dialogflow.v2.ConversationEvent] protos.
-  bool enable_stackdriver_logging = 3;
-}
-
-// The type of Human Agent Assistant API suggestion to perform, and the maximum
-// number of results to return for that type. Multiple `Feature` objects can
-// be specified in the `features` list.
-message SuggestionFeature {
-  // Defines the type of Human Agent Assistant feature.
-  enum Type {
-    // Unspecified feature type.
-    TYPE_UNSPECIFIED = 0;
-
-    // Run article suggestion model.
-    ARTICLE_SUGGESTION = 1;
-
-    // Run FAQ model.
-    FAQ = 2;
-  }
-
-  // Type of Human Agent Assistant API feature to request.
-  Type type = 1;
-}
diff --git a/google/cloud/dialogflow_v2/proto/document.proto b/google/cloud/dialogflow_v2/proto/document.proto
deleted file mode 100644
index a3bc4b77b..000000000
--- a/google/cloud/dialogflow_v2/proto/document.proto
+++ /dev/null
@@ -1,410 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-import "google/rpc/status.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "DocumentProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing knowledge [Documents][google.cloud.dialogflow.v2.Document].
-service Documents {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all documents of the knowledge base.
-  rpc ListDocuments(ListDocumentsRequest) returns (ListDocumentsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/knowledgeBases/*}/documents"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/knowledgeBases/*}/documents"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/agent/knowledgeBases/*}/documents"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified document.
-  rpc GetDocument(GetDocumentRequest) returns (Document) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/knowledgeBases/*/documents/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/knowledgeBases/*/documents/*}"
-      }
-      additional_bindings {
-        get: "/v2/{name=projects/*/agent/knowledgeBases/*/documents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a new document.
-  //
-  // Operation <response: [Document][google.cloud.dialogflow.v2.Document],
-  //            metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
-  rpc CreateDocument(CreateDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/knowledgeBases/*}/documents"
-      body: "document"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/knowledgeBases/*}/documents"
-        body: "document"
-      }
-      additional_bindings {
-        post: "/v2/{parent=projects/*/agent/knowledgeBases/*}/documents"
-        body: "document"
-      }
-    };
-    option (google.api.method_signature) = "parent,document";
-    option (google.longrunning.operation_info) = {
-      response_type: "Document"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Deletes the specified document.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty],
-  //            metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
-  rpc DeleteDocument(DeleteDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/knowledgeBases/*/documents/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/knowledgeBases/*/documents/*}"
-      }
-      additional_bindings {
-        delete: "/v2/{name=projects/*/agent/knowledgeBases/*/documents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Updates the specified document.
-  //
-  // Operation <response: [Document][google.cloud.dialogflow.v2.Document],
-  //            metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
-  rpc UpdateDocument(UpdateDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      patch: "/v2/{document.name=projects/*/knowledgeBases/*/documents/*}"
-      body: "document"
-      additional_bindings {
-        patch: "/v2/{document.name=projects/*/locations/*/knowledgeBases/*/documents/*}"
-        body: "document"
-      }
-      additional_bindings {
-        patch: "/v2/{document.name=projects/*/agent/knowledgeBases/*/documents/*}"
-        body: "document"
-      }
-    };
-    option (google.api.method_signature) = "document,update_mask";
-    option (google.longrunning.operation_info) = {
-      response_type: "Document"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Reloads the specified document from its specified source, content_uri or
-  // content. The previously loaded content of the document will be deleted.
-  // Note: Even when the content of the document has not changed, there still
-  // may be side effects because of internal implementation changes.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  //
-  // Operation <response: [Document][google.cloud.dialogflow.v2.Document],
-  //            metadata: [KnowledgeOperationMetadata][google.cloud.dialogflow.v2.KnowledgeOperationMetadata]>
-  rpc ReloadDocument(ReloadDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{name=projects/*/knowledgeBases/*/documents/*}:reload"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{name=projects/*/locations/*/knowledgeBases/*/documents/*}:reload"
-        body: "*"
-      }
-      additional_bindings {
-        post: "/v2/{name=projects/*/agent/knowledgeBases/*/documents/*}:reload"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "name,content_uri";
-    option (google.longrunning.operation_info) = {
-      response_type: "Document"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-}
-
-// A knowledge document to be used by a [KnowledgeBase][google.cloud.dialogflow.v2.KnowledgeBase].
-//
-// For more information, see the [knowledge base
-// guide](https://cloud.google.com/dialogflow/docs/how/knowledge-bases).
-//
-// Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-// only use `projects.knowledgeBases.documents`.
-message Document {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Document"
-    pattern: "projects/{project}/knowledgeBases/{knowledge_base}/documents/{document}"
-    pattern: "projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}/documents/{document}"
-  };
-
-  // The status of a reload attempt.
-  message ReloadStatus {
-    // The time of a reload attempt.
-    // This reload may have been triggered automatically or manually and may
-    // not have succeeded.
-    google.protobuf.Timestamp time = 1;
-
-    // The status of a reload attempt or the initial load.
-    google.rpc.Status status = 2;
-  }
-
-  // The knowledge type of document content.
-  enum KnowledgeType {
-    // The type is unspecified or arbitrary.
-    KNOWLEDGE_TYPE_UNSPECIFIED = 0;
-
-    // The document content contains question and answer pairs as either HTML or
-    // CSV. Typical FAQ HTML formats are parsed accurately, but unusual formats
-    // may fail to be parsed.
-    //
-    // CSV must have questions in the first column and answers in the second,
-    // with no header. Because of this explicit format, they are always parsed
-    // accurately.
-    FAQ = 1;
-
-    // Documents for which unstructured text is extracted and used for
-    // question answering.
-    EXTRACTIVE_QA = 2;
-
-    // The entire document content as a whole can be used for query results.
-    // Only for Contact Center Solutions on Dialogflow.
-    ARTICLE_SUGGESTION = 3;
-  }
-
-  // Optional. The document resource name.
-  // The name must be empty when creating a document.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. The display name of the document. The name must be 1024 bytes or
-  // less; otherwise, the creation request fails.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The MIME type of this document.
-  string mime_type = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The knowledge type of document content.
-  repeated KnowledgeType knowledge_types = 4 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The source of this document.
-  oneof source {
-    // The URI where the file content is located.
-    //
-    // For documents stored in Google Cloud Storage, these URIs must have
-    // the form `gs://<bucket-name>/<object-name>`.
-    //
-    // NOTE: External URLs must correspond to public webpages, i.e., they must
-    // be indexed by Google Search. In particular, URLs for showing documents in
-    // Google Cloud Storage (i.e. the URL in your browser) are not supported.
-    // Instead use the `gs://` format URI described above.
-    string content_uri = 5;
-
-    // The raw content of the document. This field is only permitted for
-    // EXTRACTIVE_QA and FAQ knowledge types.
-    bytes raw_content = 9;
-  }
-
-  // Optional. If true, we try to automatically reload the document every day
-  // (at a time picked by the system). If false or unspecified, we don't try
-  // to automatically reload the document.
-  //
-  // Currently you can only enable automatic reload for documents sourced from
-  // a public url, see `source` field for the source types.
-  //
-  // Reload status can be tracked in `latest_reload_status`. If a reload
-  // fails, we will keep the document unchanged.
-  //
-  // If a reload fails with internal errors, the system will try to reload the
-  // document on the next day.
-  // If a reload fails with non-retriable errors (e.g. PERMISION_DENIED), the
-  // system will not try to reload the document anymore. You need to manually
-  // reload the document successfully by calling `ReloadDocument` and clear the
-  // errors.
-  bool enable_auto_reload = 11 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The time and status of the latest reload.
-  // This reload may have been triggered automatically or manually
-  // and may not have succeeded.
-  ReloadStatus latest_reload_status = 12 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Optional. Metadata for the document. The metadata supports arbitrary
-  // key-value pairs. Suggested use cases include storing a document's title,
-  // an external URL distinct from the document's content_uri, etc.
-  // The max size of a `key` or a `value` of the metadata is 1024 bytes.
-  map<string, string> metadata = 7 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Request message for [Documents.GetDocument][google.cloud.dialogflow.v2.Documents.GetDocument].
-message GetDocumentRequest {
-  // Required. The name of the document to retrieve.
-  // Format `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-}
-
-// Request message for [Documents.ListDocuments][google.cloud.dialogflow.v2.Documents.ListDocuments].
-message ListDocumentsRequest {
-  // Required. The knowledge base to list all documents for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // The maximum number of items to return in a single page. By
-  // default 10 and at most 100.
-  int32 page_size = 2;
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// Response message for [Documents.ListDocuments][google.cloud.dialogflow.v2.Documents.ListDocuments].
-message ListDocumentsResponse {
-  // The list of documents.
-  repeated Document documents = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// Request message for [Documents.CreateDocument][google.cloud.dialogflow.v2.Documents.CreateDocument].
-message CreateDocumentRequest {
-  // Required. The knowledge base to create a document for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // Required. The document to create.
-  Document document = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Request message for [Documents.DeleteDocument][google.cloud.dialogflow.v2.Documents.DeleteDocument].
-message DeleteDocumentRequest {
-  // Required. The name of the document to delete.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-}
-
-// Request message for [Documents.UpdateDocument][google.cloud.dialogflow.v2.Documents.UpdateDocument].
-message UpdateDocumentRequest {
-  // Required. The document to update.
-  Document document = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Not specified means `update all`.
-  // Currently, only `display_name` can be updated, an InvalidArgument will be
-  // returned for attempting to update other fields.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Request message for [Documents.ReloadDocument][google.cloud.dialogflow.v2.Documents.ReloadDocument].
-message ReloadDocumentRequest {
-  // Required. The name of the document to reload.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // The source for document reloading.
-  // If provided, the service will load the contents from the source
-  // and update document in the knowledge base.
-  oneof source {
-    // Optional. The path of gcs source file for reloading document content. For now,
-    // only gcs uri is supported.
-    //
-    // For documents stored in Google Cloud Storage, these URIs must have
-    // the form `gs://<bucket-name>/<object-name>`.
-    string content_uri = 3 [(google.api.field_behavior) = OPTIONAL];
-  }
-}
-
-// Metadata in google::longrunning::Operation for Knowledge operations.
-message KnowledgeOperationMetadata {
-  // States of the operation.
-  enum State {
-    // State unspecified.
-    STATE_UNSPECIFIED = 0;
-
-    // The operation has been created.
-    PENDING = 1;
-
-    // The operation is currently running.
-    RUNNING = 2;
-
-    // The operation is done, either cancelled or completed.
-    DONE = 3;
-  }
-
-  // Output only. The current state of this operation.
-  State state = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
diff --git a/google/cloud/dialogflow_v2/proto/entity_type.proto b/google/cloud/dialogflow_v2/proto/entity_type.proto
deleted file mode 100644
index c15b5a188..000000000
--- a/google/cloud/dialogflow_v2/proto/entity_type.proto
+++ /dev/null
@@ -1,547 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "EntityTypeProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [EntityTypes][google.cloud.dialogflow.v2.EntityType].
-service EntityTypes {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all entity types in the specified agent.
-  rpc ListEntityTypes(ListEntityTypesRequest) returns (ListEntityTypesResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/agent}/entityTypes"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent}/entityTypes"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.api.method_signature) = "parent,language_code";
-  }
-
-  // Retrieves the specified entity type.
-  rpc GetEntityType(GetEntityTypeRequest) returns (EntityType) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/agent/entityTypes/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/agent/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-    option (google.api.method_signature) = "name,language_code";
-  }
-
-  // Creates an entity type in the specified agent.
-  rpc CreateEntityType(CreateEntityTypeRequest) returns (EntityType) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent}/entityTypes"
-      body: "entity_type"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent}/entityTypes"
-        body: "entity_type"
-      }
-    };
-    option (google.api.method_signature) = "parent,entity_type";
-    option (google.api.method_signature) = "parent,entity_type,language_code";
-  }
-
-  // Updates the specified entity type.
-  rpc UpdateEntityType(UpdateEntityTypeRequest) returns (EntityType) {
-    option (google.api.http) = {
-      patch: "/v2/{entity_type.name=projects/*/agent/entityTypes/*}"
-      body: "entity_type"
-      additional_bindings {
-        patch: "/v2/{entity_type.name=projects/*/locations/*/agent/entityTypes/*}"
-        body: "entity_type"
-      }
-    };
-    option (google.api.method_signature) = "entity_type";
-    option (google.api.method_signature) = "entity_type,language_code";
-  }
-
-  // Deletes the specified entity type.
-  rpc DeleteEntityType(DeleteEntityTypeRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/agent/entityTypes/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/agent/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Updates/Creates multiple entity types in the specified agent.
-  //
-  // Operation <response: [BatchUpdateEntityTypesResponse][google.cloud.dialogflow.v2.BatchUpdateEntityTypesResponse]>
-  rpc BatchUpdateEntityTypes(BatchUpdateEntityTypesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent}/entityTypes:batchUpdate"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent}/entityTypes:batchUpdate"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "google.cloud.dialogflow.v2.BatchUpdateEntityTypesResponse"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Deletes entity types in the specified agent.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchDeleteEntityTypes(BatchDeleteEntityTypesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent}/entityTypes:batchDelete"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent}/entityTypes:batchDelete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entity_type_names";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Creates multiple new entities in the specified entity type.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchCreateEntities(BatchCreateEntitiesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent/entityTypes/*}/entities:batchCreate"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/entityTypes/*}/entities:batchCreate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entities";
-    option (google.api.method_signature) = "parent,entities,language_code";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Updates or creates multiple entities in the specified entity type. This
-  // method does not affect entities in the entity type that aren't explicitly
-  // specified in the request.
-  //
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchUpdateEntities(BatchUpdateEntitiesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent/entityTypes/*}/entities:batchUpdate"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/entityTypes/*}/entities:batchUpdate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entities";
-    option (google.api.method_signature) = "parent,entities,language_code";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Deletes entities in the specified entity type.
-  //
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchDeleteEntities(BatchDeleteEntitiesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent/entityTypes/*}/entities:batchDelete"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/entityTypes/*}/entities:batchDelete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entity_values";
-    option (google.api.method_signature) = "parent,entity_values,language_code";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-}
-
-// Each intent parameter has a type, called the entity type, which dictates
-// exactly how data from an end-user expression is extracted.
-//
-// Dialogflow provides predefined system entities that can match many common
-// types of data. For example, there are system entities for matching dates,
-// times, colors, email addresses, and so on. You can also create your own
-// custom entities for matching custom data. For example, you could define a
-// vegetable entity that can match the types of vegetables available for
-// purchase with a grocery store agent.
-//
-// For more information, see the
-// [Entity guide](https://cloud.google.com/dialogflow/docs/entities-overview).
-message EntityType {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/EntityType"
-    pattern: "projects/{project}/agent/entityTypes/{entity_type}"
-  };
-
-  // An **entity entry** for an associated entity type.
-  message Entity {
-    // Required. The primary value associated with this entity entry.
-    // For example, if the entity type is *vegetable*, the value could be
-    // *scallions*.
-    //
-    // For `KIND_MAP` entity types:
-    //
-    // *   A reference value to be used in place of synonyms.
-    //
-    // For `KIND_LIST` entity types:
-    //
-    // *   A string that can contain references to other entity types (with or
-    //     without aliases).
-    string value = 1 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. A collection of value synonyms. For example, if the entity type
-    // is *vegetable*, and `value` is *scallions*, a synonym could be *green
-    // onions*.
-    //
-    // For `KIND_LIST` entity types:
-    //
-    // *   This collection must contain exactly one synonym equal to `value`.
-    repeated string synonyms = 2 [(google.api.field_behavior) = REQUIRED];
-  }
-
-  // Represents kinds of entities.
-  enum Kind {
-    // Not specified. This value should be never used.
-    KIND_UNSPECIFIED = 0;
-
-    // Map entity types allow mapping of a group of synonyms to a reference
-    // value.
-    KIND_MAP = 1;
-
-    // List entity types contain a set of entries that do not map to reference
-    // values. However, list entity types can contain references to other entity
-    // types (with or without aliases).
-    KIND_LIST = 2;
-
-    // Regexp entity types allow to specify regular expressions in entries
-    // values.
-    KIND_REGEXP = 3;
-  }
-
-  // Represents different entity type expansion modes. Automated expansion
-  // allows an agent to recognize values that have not been explicitly listed in
-  // the entity (for example, new kinds of shopping list items).
-  enum AutoExpansionMode {
-    // Auto expansion disabled for the entity.
-    AUTO_EXPANSION_MODE_UNSPECIFIED = 0;
-
-    // Allows an agent to recognize values that have not been explicitly
-    // listed in the entity.
-    AUTO_EXPANSION_MODE_DEFAULT = 1;
-  }
-
-  // The unique identifier of the entity type.
-  // Required for [EntityTypes.UpdateEntityType][google.cloud.dialogflow.v2.EntityTypes.UpdateEntityType] and
-  // [EntityTypes.BatchUpdateEntityTypes][google.cloud.dialogflow.v2.EntityTypes.BatchUpdateEntityTypes] methods.
-  // Format: `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`.
-  string name = 1;
-
-  // Required. The name of the entity type.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. Indicates the kind of entity type.
-  Kind kind = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Indicates whether the entity type can be automatically
-  // expanded.
-  AutoExpansionMode auto_expansion_mode = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of entity entries associated with the entity type.
-  repeated Entity entities = 6 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Enables fuzzy entity extraction during classification.
-  bool enable_fuzzy_extraction = 7 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.ListEntityTypes][google.cloud.dialogflow.v2.EntityTypes.ListEntityTypes].
-message ListEntityTypesRequest {
-  // Required. The agent to list all entity types from.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 4 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [EntityTypes.ListEntityTypes][google.cloud.dialogflow.v2.EntityTypes.ListEntityTypes].
-message ListEntityTypesResponse {
-  // The list of agent entity types. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated EntityType entity_types = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [EntityTypes.GetEntityType][google.cloud.dialogflow.v2.EntityTypes.GetEntityType].
-message GetEntityTypeRequest {
-  // Required. The name of the entity type.
-  // Format: `projects/<Project ID>/agent/entityTypes/<EntityType ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.CreateEntityType][google.cloud.dialogflow.v2.EntityTypes.CreateEntityType].
-message CreateEntityTypeRequest {
-  // Required. The agent to create a entity type for.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The entity type to create.
-  EntityType entity_type = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.UpdateEntityType][google.cloud.dialogflow.v2.EntityTypes.UpdateEntityType].
-message UpdateEntityTypeRequest {
-  // Required. The entity type to update.
-  EntityType entity_type = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.DeleteEntityType][google.cloud.dialogflow.v2.EntityTypes.DeleteEntityType].
-message DeleteEntityTypeRequest {
-  // Required. The name of the entity type to delete.
-  // Format: `projects/<Project ID>/agent/entityTypes/<EntityType ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-}
-
-// The request message for [EntityTypes.BatchUpdateEntityTypes][google.cloud.dialogflow.v2.EntityTypes.BatchUpdateEntityTypes].
-message BatchUpdateEntityTypesRequest {
-  // Required. The name of the agent to update or create entity types in.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // The source of the entity type batch.
-  //
-  // For each entity type in the batch:
-  //
-  // *   If `name` is specified, we update an existing entity type.
-  // *   If `name` is not specified, we create a new entity type.
-  oneof entity_type_batch {
-    // The URI to a Google Cloud Storage file containing entity types to update
-    // or create. The file format can either be a serialized proto (of
-    // EntityBatch type) or a JSON object. Note: The URI must start with
-    // "gs://".
-    string entity_type_batch_uri = 2;
-
-    // The collection of entity types to update or create.
-    EntityTypeBatch entity_type_batch_inline = 3;
-  }
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 5 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [EntityTypes.BatchUpdateEntityTypes][google.cloud.dialogflow.v2.EntityTypes.BatchUpdateEntityTypes].
-message BatchUpdateEntityTypesResponse {
-  // The collection of updated or created entity types.
-  repeated EntityType entity_types = 1;
-}
-
-// The request message for [EntityTypes.BatchDeleteEntityTypes][google.cloud.dialogflow.v2.EntityTypes.BatchDeleteEntityTypes].
-message BatchDeleteEntityTypesRequest {
-  // Required. The name of the agent to delete all entities types for. Format:
-  // `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The names entity types to delete. All names must point to the
-  // same agent as `parent`.
-  repeated string entity_type_names = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [EntityTypes.BatchCreateEntities][google.cloud.dialogflow.v2.EntityTypes.BatchCreateEntities].
-message BatchCreateEntitiesRequest {
-  // Required. The name of the entity type to create entities in. Format:
-  // `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The entities to create.
-  repeated EntityType.Entity entities = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.BatchUpdateEntities][google.cloud.dialogflow.v2.EntityTypes.BatchUpdateEntities].
-message BatchUpdateEntitiesRequest {
-  // Required. The name of the entity type to update or create entities in.
-  // Format: `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The entities to update or create.
-  repeated EntityType.Entity entities = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 4 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.BatchDeleteEntities][google.cloud.dialogflow.v2.EntityTypes.BatchDeleteEntities].
-message BatchDeleteEntitiesRequest {
-  // Required. The name of the entity type to delete entries for. Format:
-  // `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The reference `values` of the entities to delete. Note that
-  // these are not fully-qualified names, i.e. they don't start with
-  // `projects/<Project ID>`.
-  repeated string entity_values = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// This message is a wrapper around a collection of entity types.
-message EntityTypeBatch {
-  // A collection of entity types.
-  repeated EntityType entity_types = 1;
-}
diff --git a/google/cloud/dialogflow_v2/proto/environment.proto b/google/cloud/dialogflow_v2/proto/environment.proto
deleted file mode 100644
index db8885425..000000000
--- a/google/cloud/dialogflow_v2/proto/environment.proto
+++ /dev/null
@@ -1,146 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-import "google/api/client.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "EnvironmentProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [Environments][google.cloud.dialogflow.v2.Environment].
-service Environments {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all non-draft environments of the specified agent.
-  rpc ListEnvironments(ListEnvironmentsRequest) returns (ListEnvironmentsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/agent}/environments"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent}/environments"
-      }
-    };
-  }
-}
-
-// You can create multiple versions of your agent and publish them to separate
-// environments.
-//
-// When you edit an agent, you are editing the draft agent. At any point, you
-// can save the draft agent as an agent version, which is an immutable snapshot
-// of your agent.
-//
-// When you save the draft agent, it is published to the default environment.
-// When you create agent versions, you can publish them to custom environments.
-// You can create a variety of custom environments for:
-//
-// - testing
-// - development
-// - production
-// - etc.
-//
-// For more information, see the [versions and environments
-// guide](https://cloud.google.com/dialogflow/docs/agents-versions).
-message Environment {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Environment"
-    pattern: "projects/{project}/agent/environments/{environment}"
-  };
-
-  // Represents an environment state. When an environment is pointed to a new
-  // agent version, the environment is temporarily set to the `LOADING` state.
-  // During that time, the environment keeps on serving the previous version of
-  // the agent. After the new agent version is done loading, the environment is
-  // set back to the `RUNNING` state.
-  enum State {
-    // Not specified. This value is not used.
-    STATE_UNSPECIFIED = 0;
-
-    // Stopped.
-    STOPPED = 1;
-
-    // Loading.
-    LOADING = 2;
-
-    // Running.
-    RUNNING = 3;
-  }
-
-  // Output only. The unique identifier of this agent environment.
-  // Format: `projects/<Project ID>/agent/environments/<Environment ID>`.
-  // For Environment ID, "-" is reserved for 'draft' environment.
-  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Optional. The developer-provided description for this environment.
-  // The maximum length is 500 characters. If exceeded, the request is rejected.
-  string description = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The agent version loaded into this environment.
-  // Format: `projects/<Project ID>/agent/versions/<Version ID>`.
-  string agent_version = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The state of this environment. This field is read-only, i.e., it cannot be
-  // set by create and update methods.
-  State state = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The last update time of this environment. This field is read-only, i.e., it
-  // cannot be set by create and update methods.
-  google.protobuf.Timestamp update_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// The request message for [Environments.ListEnvironments][google.cloud.dialogflow.v2.Environments.ListEnvironments].
-message ListEnvironmentsRequest {
-  // Required. The agent to list all environments from.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Environment"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By default 100 and
-  // at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Environments.ListEnvironments][google.cloud.dialogflow.v2.Environments.ListEnvironments].
-message ListEnvironmentsResponse {
-  // The list of agent environments. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Environment environments = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
diff --git a/google/cloud/dialogflow_v2/proto/gcs.proto b/google/cloud/dialogflow_v2/proto/gcs.proto
deleted file mode 100644
index 1fb2dc99c..000000000
--- a/google/cloud/dialogflow_v2/proto/gcs.proto
+++ /dev/null
@@ -1,28 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/field_behavior.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "GcsProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
diff --git a/google/cloud/dialogflow_v2/proto/human_agent_assistant_event.proto b/google/cloud/dialogflow_v2/proto/human_agent_assistant_event.proto
deleted file mode 100644
index f79ce9d46..000000000
--- a/google/cloud/dialogflow_v2/proto/human_agent_assistant_event.proto
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/cloud/dialogflow/v2/participant.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "HumanAgentAssistantEventProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Represents a notification sent to Cloud Pub/Sub subscribers for
-// human agent assistant events in a specific conversation.
-message HumanAgentAssistantEvent {
-  // The conversation this notification refers to.
-  // Format: `projects/<Project ID>/conversations/<Conversation ID>`.
-  string conversation = 1;
-
-  // The participant that the suggestion is compiled for.
-  // Format: `projects/<Project ID>/conversations/<Conversation
-  // ID>/participants/<Participant ID>`. It will not be set in legacy workflow.
-  string participant = 3;
-
-  // The suggestion results payload that this notification refers to.
-  repeated SuggestionResult suggestion_results = 5;
-}
diff --git a/google/cloud/dialogflow_v2/proto/intent.proto b/google/cloud/dialogflow_v2/proto/intent.proto
deleted file mode 100644
index b61109585..000000000
--- a/google/cloud/dialogflow_v2/proto/intent.proto
+++ /dev/null
@@ -1,1067 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/audio_config.proto";
-import "google/cloud/dialogflow/v2/context.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "IntentProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [Intents][google.cloud.dialogflow.v2.Intent].
-service Intents {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all intents in the specified agent.
-  rpc ListIntents(ListIntentsRequest) returns (ListIntentsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/agent}/intents"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent}/intents"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/agent/environments/*}/intents"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.api.method_signature) = "parent,language_code";
-  }
-
-  // Retrieves the specified intent.
-  rpc GetIntent(GetIntentRequest) returns (Intent) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/agent/intents/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/agent/intents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-    option (google.api.method_signature) = "name,language_code";
-  }
-
-  // Creates an intent in the specified agent.
-  rpc CreateIntent(CreateIntentRequest) returns (Intent) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent}/intents"
-      body: "intent"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent}/intents"
-        body: "intent"
-      }
-    };
-    option (google.api.method_signature) = "parent,intent";
-    option (google.api.method_signature) = "parent,intent,language_code";
-  }
-
-  // Updates the specified intent.
-  rpc UpdateIntent(UpdateIntentRequest) returns (Intent) {
-    option (google.api.http) = {
-      patch: "/v2/{intent.name=projects/*/agent/intents/*}"
-      body: "intent"
-      additional_bindings {
-        patch: "/v2/{intent.name=projects/*/locations/*/agent/intents/*}"
-        body: "intent"
-      }
-    };
-    option (google.api.method_signature) = "intent,language_code";
-    option (google.api.method_signature) = "intent,language_code,update_mask";
-  }
-
-  // Deletes the specified intent and its direct or indirect followup intents.
-  rpc DeleteIntent(DeleteIntentRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/agent/intents/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/agent/intents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Updates/Creates multiple intents in the specified agent.
-  //
-  // Operation <response: [BatchUpdateIntentsResponse][google.cloud.dialogflow.v2.BatchUpdateIntentsResponse]>
-  rpc BatchUpdateIntents(BatchUpdateIntentsRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent}/intents:batchUpdate"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent}/intents:batchUpdate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,intent_batch_uri";
-    option (google.api.method_signature) = "parent,intent_batch_inline";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.cloud.dialogflow.v2.BatchUpdateIntentsResponse"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Deletes intents in the specified agent.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchDeleteIntents(BatchDeleteIntentsRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent}/intents:batchDelete"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent}/intents:batchDelete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,intents";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-}
-
-// An intent categorizes an end-user's intention for one conversation turn. For
-// each agent, you define many intents, where your combined intents can handle a
-// complete conversation. When an end-user writes or says something, referred to
-// as an end-user expression or end-user input, Dialogflow matches the end-user
-// input to the best intent in your agent. Matching an intent is also known as
-// intent classification.
-//
-// For more information, see the [intent
-// guide](https://cloud.google.com/dialogflow/docs/intents-overview).
-message Intent {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Intent"
-    pattern: "projects/{project}/agent/intents/{intent}"
-  };
-
-  // Represents an example that the agent is trained on.
-  message TrainingPhrase {
-    // Represents a part of a training phrase.
-    message Part {
-      // Required. The text for this part.
-      string text = 1;
-
-      // Optional. The entity type name prefixed with `@`.
-      // This field is required for annotated parts of the training phrase.
-      string entity_type = 2 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The parameter name for the value extracted from the
-      // annotated part of the example.
-      // This field is required for annotated parts of the training phrase.
-      string alias = 3 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. Indicates whether the text was manually annotated.
-      // This field is set to true when the Dialogflow Console is used to
-      // manually annotate the part. When creating an annotated part with the
-      // API, you must set this to true.
-      bool user_defined = 4 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // Represents different types of training phrases.
-    enum Type {
-      // Not specified. This value should never be used.
-      TYPE_UNSPECIFIED = 0;
-
-      // Examples do not contain @-prefixed entity type names, but example parts
-      // can be annotated with entity types.
-      EXAMPLE = 1;
-
-      // Templates are not annotated with entity types, but they can contain
-      // @-prefixed entity type names as substrings.
-      // Template mode has been deprecated. Example mode is the only supported
-      // way to create new training phrases. If you have existing training
-      // phrases that you've created in template mode, those will continue to
-      // work.
-      TEMPLATE = 2 [deprecated = true];
-    }
-
-    // Output only. The unique identifier of this training phrase.
-    string name = 1;
-
-    // Required. The type of the training phrase.
-    Type type = 2 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. The ordered list of training phrase parts.
-    // The parts are concatenated in order to form the training phrase.
-    //
-    // Note: The API does not automatically annotate training phrases like the
-    // Dialogflow Console does.
-    //
-    // Note: Do not forget to include whitespace at part boundaries,
-    // so the training phrase is well formatted when the parts are concatenated.
-    //
-    // If the training phrase does not need to be annotated with parameters,
-    // you just need a single part with only the [Part.text][google.cloud.dialogflow.v2.Intent.TrainingPhrase.Part.text] field set.
-    //
-    // If you want to annotate the training phrase, you must create multiple
-    // parts, where the fields of each part are populated in one of two ways:
-    //
-    // -   `Part.text` is set to a part of the phrase that has no parameters.
-    // -   `Part.text` is set to a part of the phrase that you want to annotate,
-    //     and the `entity_type`, `alias`, and `user_defined` fields are all
-    //     set.
-    repeated Part parts = 3 [(google.api.field_behavior) = REQUIRED];
-
-    // Optional. Indicates how many times this example was added to
-    // the intent. Each time a developer adds an existing sample by editing an
-    // intent or training, this counter is increased.
-    int32 times_added_count = 4 [(google.api.field_behavior) = OPTIONAL];
-  }
-
-  // Represents intent parameters.
-  message Parameter {
-    // The unique identifier of this parameter.
-    string name = 1;
-
-    // Required. The name of the parameter.
-    string display_name = 2;
-
-    // Optional. The definition of the parameter value. It can be:
-    //
-    // - a constant string,
-    // - a parameter value defined as `$parameter_name`,
-    // - an original parameter value defined as `$parameter_name.original`,
-    // - a parameter value from some context defined as
-    //   `#context_name.parameter_name`.
-    string value = 3 [(google.api.field_behavior) = OPTIONAL];
-
-    // Optional. The default value to use when the `value` yields an empty
-    // result.
-    // Default values can be extracted from contexts by using the following
-    // syntax: `#context_name.parameter_name`.
-    string default_value = 4 [(google.api.field_behavior) = OPTIONAL];
-
-    // Optional. The name of the entity type, prefixed with `@`, that
-    // describes values of the parameter. If the parameter is
-    // required, this must be provided.
-    string entity_type_display_name = 5 [(google.api.field_behavior) = OPTIONAL];
-
-    // Optional. Indicates whether the parameter is required. That is,
-    // whether the intent cannot be completed without collecting the parameter
-    // value.
-    bool mandatory = 6 [(google.api.field_behavior) = OPTIONAL];
-
-    // Optional. The collection of prompts that the agent can present to the
-    // user in order to collect a value for the parameter.
-    repeated string prompts = 7 [(google.api.field_behavior) = OPTIONAL];
-
-    // Optional. Indicates whether the parameter represents a list of values.
-    bool is_list = 8 [(google.api.field_behavior) = OPTIONAL];
-  }
-
-  // A rich response message.
-  // Corresponds to the intent `Response` field in the Dialogflow console.
-  // For more information, see
-  // [Rich response
-  // messages](https://cloud.google.com/dialogflow/docs/intents-rich-messages).
-  message Message {
-    // The text response message.
-    message Text {
-      // Optional. The collection of the agent's responses.
-      repeated string text = 1 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The image response message.
-    message Image {
-      // Optional. The public URI to an image file.
-      string image_uri = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. A text description of the image to be used for accessibility,
-      // e.g., screen readers.
-      string accessibility_text = 2 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The quick replies response message.
-    message QuickReplies {
-      // Optional. The title of the collection of quick replies.
-      string title = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The collection of quick replies.
-      repeated string quick_replies = 2 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The card response message.
-    message Card {
-      // Contains information about a button.
-      message Button {
-        // Optional. The text to show on the button.
-        string text = 1 [(google.api.field_behavior) = OPTIONAL];
-
-        // Optional. The text to send back to the Dialogflow API or a URI to
-        // open.
-        string postback = 2 [(google.api.field_behavior) = OPTIONAL];
-      }
-
-      // Optional. The title of the card.
-      string title = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The subtitle of the card.
-      string subtitle = 2 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The public URI to an image file for the card.
-      string image_uri = 3 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The collection of card buttons.
-      repeated Button buttons = 4 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The simple response message containing speech or text.
-    message SimpleResponse {
-      // One of text_to_speech or ssml must be provided. The plain text of the
-      // speech output. Mutually exclusive with ssml.
-      string text_to_speech = 1;
-
-      // One of text_to_speech or ssml must be provided. Structured spoken
-      // response to the user in the SSML format. Mutually exclusive with
-      // text_to_speech.
-      string ssml = 2;
-
-      // Optional. The text to display.
-      string display_text = 3 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The collection of simple response candidates.
-    // This message in `QueryResult.fulfillment_messages` and
-    // `WebhookResponse.fulfillment_messages` should contain only one
-    // `SimpleResponse`.
-    message SimpleResponses {
-      // Required. The list of simple responses.
-      repeated SimpleResponse simple_responses = 1 [(google.api.field_behavior) = REQUIRED];
-    }
-
-    // The basic card message. Useful for displaying information.
-    message BasicCard {
-      // The button object that appears at the bottom of a card.
-      message Button {
-        // Opens the given URI.
-        message OpenUriAction {
-          // Required. The HTTP or HTTPS scheme URI.
-          string uri = 1;
-        }
-
-        // Required. The title of the button.
-        string title = 1;
-
-        // Required. Action to take when a user taps on the button.
-        OpenUriAction open_uri_action = 2 [(google.api.field_behavior) = REQUIRED];
-      }
-
-      // Optional. The title of the card.
-      string title = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The subtitle of the card.
-      string subtitle = 2 [(google.api.field_behavior) = OPTIONAL];
-
-      // Required, unless image is present. The body text of the card.
-      string formatted_text = 3;
-
-      // Optional. The image for the card.
-      Image image = 4 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. The collection of card buttons.
-      repeated Button buttons = 5 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The suggestion chip message that the user can tap to quickly post a reply
-    // to the conversation.
-    message Suggestion {
-      // Required. The text shown the in the suggestion chip.
-      string title = 1 [(google.api.field_behavior) = REQUIRED];
-    }
-
-    // The collection of suggestions.
-    message Suggestions {
-      // Required. The list of suggested replies.
-      repeated Suggestion suggestions = 1 [(google.api.field_behavior) = REQUIRED];
-    }
-
-    // The suggestion chip message that allows the user to jump out to the app
-    // or website associated with this agent.
-    message LinkOutSuggestion {
-      // Required. The name of the app or site this chip is linking to.
-      string destination_name = 1 [(google.api.field_behavior) = REQUIRED];
-
-      // Required. The URI of the app or site to open when the user taps the
-      // suggestion chip.
-      string uri = 2 [(google.api.field_behavior) = REQUIRED];
-    }
-
-    // The card for presenting a list of options to select from.
-    message ListSelect {
-      // An item in the list.
-      message Item {
-        // Required. Additional information about this option.
-        SelectItemInfo info = 1 [(google.api.field_behavior) = REQUIRED];
-
-        // Required. The title of the list item.
-        string title = 2 [(google.api.field_behavior) = REQUIRED];
-
-        // Optional. The main text describing the item.
-        string description = 3 [(google.api.field_behavior) = OPTIONAL];
-
-        // Optional. The image to display.
-        Image image = 4 [(google.api.field_behavior) = OPTIONAL];
-      }
-
-      // Optional. The overall title of the list.
-      string title = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Required. List items.
-      repeated Item items = 2 [(google.api.field_behavior) = REQUIRED];
-
-      // Optional. Subtitle of the list.
-      string subtitle = 3 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The card for presenting a carousel of options to select from.
-    message CarouselSelect {
-      // An item in the carousel.
-      message Item {
-        // Required. Additional info about the option item.
-        SelectItemInfo info = 1 [(google.api.field_behavior) = REQUIRED];
-
-        // Required. Title of the carousel item.
-        string title = 2 [(google.api.field_behavior) = REQUIRED];
-
-        // Optional. The body text of the card.
-        string description = 3 [(google.api.field_behavior) = OPTIONAL];
-
-        // Optional. The image to display.
-        Image image = 4 [(google.api.field_behavior) = OPTIONAL];
-      }
-
-      // Required. Carousel items.
-      repeated Item items = 1 [(google.api.field_behavior) = REQUIRED];
-    }
-
-    // Additional info about the select item for when it is triggered in a
-    // dialog.
-    message SelectItemInfo {
-      // Required. A unique key that will be sent back to the agent if this
-      // response is given.
-      string key = 1 [(google.api.field_behavior) = REQUIRED];
-
-      // Optional. A list of synonyms that can also be used to trigger this
-      // item in dialog.
-      repeated string synonyms = 2 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The media content card for Actions on Google.
-    message MediaContent {
-      // Response media object for media content card.
-      message ResponseMediaObject {
-        // Required. Name of media card.
-        string name = 1;
-
-        // Optional. Description of media card.
-        string description = 2 [(google.api.field_behavior) = OPTIONAL];
-
-        // Image to show with the media card.
-        oneof image {
-          // Optional. Image to display above media content.
-          Image large_image = 3 [(google.api.field_behavior) = OPTIONAL];
-
-          // Optional. Icon to display above media content.
-          Image icon = 4 [(google.api.field_behavior) = OPTIONAL];
-        }
-
-        // Required. Url where the media is stored.
-        string content_url = 5;
-      }
-
-      // Format of response media type.
-      enum ResponseMediaType {
-        // Unspecified.
-        RESPONSE_MEDIA_TYPE_UNSPECIFIED = 0;
-
-        // Response media type is audio.
-        AUDIO = 1;
-      }
-
-      // Optional. What type of media is the content (ie "audio").
-      ResponseMediaType media_type = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Required. List of media objects.
-      repeated ResponseMediaObject media_objects = 2;
-    }
-
-    // Browse Carousel Card for Actions on Google.
-    // https://developers.google.com/actions/assistant/responses#browsing_carousel
-    message BrowseCarouselCard {
-      // Browsing carousel tile
-      message BrowseCarouselCardItem {
-        // Actions on Google action to open a given url.
-        message OpenUrlAction {
-          // Type of the URI.
-          enum UrlTypeHint {
-            // Unspecified
-            URL_TYPE_HINT_UNSPECIFIED = 0;
-
-            // Url would be an amp action
-            AMP_ACTION = 1;
-
-            // URL that points directly to AMP content, or to a canonical URL
-            // which refers to AMP content via <link rel="amphtml">.
-            AMP_CONTENT = 2;
-          }
-
-          // Required. URL
-          string url = 1;
-
-          // Optional. Specifies the type of viewer that is used when opening
-          // the URL. Defaults to opening via web browser.
-          UrlTypeHint url_type_hint = 3 [(google.api.field_behavior) = OPTIONAL];
-        }
-
-        // Required. Action to present to the user.
-        OpenUrlAction open_uri_action = 1;
-
-        // Required. Title of the carousel item. Maximum of two lines of text.
-        string title = 2;
-
-        // Optional. Description of the carousel item. Maximum of four lines of
-        // text.
-        string description = 3 [(google.api.field_behavior) = OPTIONAL];
-
-        // Optional. Hero image for the carousel item.
-        Image image = 4 [(google.api.field_behavior) = OPTIONAL];
-
-        // Optional. Text that appears at the bottom of the Browse Carousel
-        // Card. Maximum of one line of text.
-        string footer = 5 [(google.api.field_behavior) = OPTIONAL];
-      }
-
-      // Image display options for Actions on Google. This should be used for
-      // when the image's aspect ratio does not match the image container's
-      // aspect ratio.
-      enum ImageDisplayOptions {
-        // Fill the gaps between the image and the image container with gray
-        // bars.
-        IMAGE_DISPLAY_OPTIONS_UNSPECIFIED = 0;
-
-        // Fill the gaps between the image and the image container with gray
-        // bars.
-        GRAY = 1;
-
-        // Fill the gaps between the image and the image container with white
-        // bars.
-        WHITE = 2;
-
-        // Image is scaled such that the image width and height match or exceed
-        // the container dimensions. This may crop the top and bottom of the
-        // image if the scaled image height is greater than the container
-        // height, or crop the left and right of the image if the scaled image
-        // width is greater than the container width. This is similar to "Zoom
-        // Mode" on a widescreen TV when playing a 4:3 video.
-        CROPPED = 3;
-
-        // Pad the gaps between image and image frame with a blurred copy of the
-        // same image.
-        BLURRED_BACKGROUND = 4;
-      }
-
-      // Required. List of items in the Browse Carousel Card. Minimum of two
-      // items, maximum of ten.
-      repeated BrowseCarouselCardItem items = 1;
-
-      // Optional. Settings for displaying the image. Applies to every image in
-      // [items][google.cloud.dialogflow.v2.Intent.Message.BrowseCarouselCard.items].
-      ImageDisplayOptions image_display_options = 2 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // Table card for Actions on Google.
-    message TableCard {
-      // Required. Title of the card.
-      string title = 1;
-
-      // Optional. Subtitle to the title.
-      string subtitle = 2 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. Image which should be displayed on the card.
-      Image image = 3 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. Display properties for the columns in this table.
-      repeated ColumnProperties column_properties = 4 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. Rows in this table of data.
-      repeated TableCardRow rows = 5 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. List of buttons for the card.
-      repeated BasicCard.Button buttons = 6 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // Column properties for [TableCard][google.cloud.dialogflow.v2.Intent.Message.TableCard].
-    message ColumnProperties {
-      // Text alignments within a cell.
-      enum HorizontalAlignment {
-        // Text is aligned to the leading edge of the column.
-        HORIZONTAL_ALIGNMENT_UNSPECIFIED = 0;
-
-        // Text is aligned to the leading edge of the column.
-        LEADING = 1;
-
-        // Text is centered in the column.
-        CENTER = 2;
-
-        // Text is aligned to the trailing edge of the column.
-        TRAILING = 3;
-      }
-
-      // Required. Column heading.
-      string header = 1;
-
-      // Optional. Defines text alignment for all cells in this column.
-      HorizontalAlignment horizontal_alignment = 2 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // Row of [TableCard][google.cloud.dialogflow.v2.Intent.Message.TableCard].
-    message TableCardRow {
-      // Optional. List of cells that make up this row.
-      repeated TableCardCell cells = 1 [(google.api.field_behavior) = OPTIONAL];
-
-      // Optional. Whether to add a visual divider after this row.
-      bool divider_after = 2 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // Cell of [TableCardRow][google.cloud.dialogflow.v2.Intent.Message.TableCardRow].
-    message TableCardCell {
-      // Required. Text in this cell.
-      string text = 1;
-    }
-
-    // The rich response message integration platform. See
-    // [Integrations](https://cloud.google.com/dialogflow/docs/integrations).
-    enum Platform {
-      // Default platform.
-      PLATFORM_UNSPECIFIED = 0;
-
-      // Facebook.
-      FACEBOOK = 1;
-
-      // Slack.
-      SLACK = 2;
-
-      // Telegram.
-      TELEGRAM = 3;
-
-      // Kik.
-      KIK = 4;
-
-      // Skype.
-      SKYPE = 5;
-
-      // Line.
-      LINE = 6;
-
-      // Viber.
-      VIBER = 7;
-
-      // Google Assistant
-      // See [Dialogflow webhook
-      // format](https://developers.google.com/assistant/actions/build/json/dialogflow-webhook-json)
-      ACTIONS_ON_GOOGLE = 8;
-
-      // Google Hangouts.
-      GOOGLE_HANGOUTS = 11;
-    }
-
-    // Required. The rich response message.
-    oneof message {
-      // The text response.
-      Text text = 1;
-
-      // The image response.
-      Image image = 2;
-
-      // The quick replies response.
-      QuickReplies quick_replies = 3;
-
-      // The card response.
-      Card card = 4;
-
-      // A custom platform-specific response.
-      google.protobuf.Struct payload = 5;
-
-      // The voice and text-only responses for Actions on Google.
-      SimpleResponses simple_responses = 7;
-
-      // The basic card response for Actions on Google.
-      BasicCard basic_card = 8;
-
-      // The suggestion chips for Actions on Google.
-      Suggestions suggestions = 9;
-
-      // The link out suggestion chip for Actions on Google.
-      LinkOutSuggestion link_out_suggestion = 10;
-
-      // The list card response for Actions on Google.
-      ListSelect list_select = 11;
-
-      // The carousel card response for Actions on Google.
-      CarouselSelect carousel_select = 12;
-
-      // Browse carousel card for Actions on Google.
-      BrowseCarouselCard browse_carousel_card = 22;
-
-      // Table card for Actions on Google.
-      TableCard table_card = 23;
-
-      // The media content card for Actions on Google.
-      MediaContent media_content = 24;
-    }
-
-    // Optional. The platform that this message is intended for.
-    Platform platform = 6 [(google.api.field_behavior) = OPTIONAL];
-  }
-
-  // Represents a single followup intent in the chain.
-  message FollowupIntentInfo {
-    // The unique identifier of the followup intent.
-    // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-    string followup_intent_name = 1;
-
-    // The unique identifier of the followup intent's parent.
-    // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-    string parent_followup_intent_name = 2;
-  }
-
-  // Represents the different states that webhooks can be in.
-  enum WebhookState {
-    // Webhook is disabled in the agent and in the intent.
-    WEBHOOK_STATE_UNSPECIFIED = 0;
-
-    // Webhook is enabled in the agent and in the intent.
-    WEBHOOK_STATE_ENABLED = 1;
-
-    // Webhook is enabled in the agent and in the intent. Also, each slot
-    // filling prompt is forwarded to the webhook.
-    WEBHOOK_STATE_ENABLED_FOR_SLOT_FILLING = 2;
-  }
-
-  // Optional. The unique identifier of this intent.
-  // Required for [Intents.UpdateIntent][google.cloud.dialogflow.v2.Intents.UpdateIntent] and [Intents.BatchUpdateIntents][google.cloud.dialogflow.v2.Intents.BatchUpdateIntents]
-  // methods.
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. The name of this intent.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Indicates whether webhooks are enabled for the intent.
-  WebhookState webhook_state = 6 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The priority of this intent. Higher numbers represent higher
-  // priorities.
-  //
-  // - If the supplied value is unspecified or 0, the service
-  //   translates the value to 500,000, which corresponds to the
-  //   `Normal` priority in the console.
-  // - If the supplied value is negative, the intent is ignored
-  //   in runtime detect intent requests.
-  int32 priority = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates whether this is a fallback intent.
-  bool is_fallback = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates whether Machine Learning is disabled for the intent.
-  // Note: If `ml_disabled` setting is set to true, then this intent is not
-  // taken into account during inference in `ML ONLY` match mode. Also,
-  // auto-markup in the UI is turned off.
-  bool ml_disabled = 19 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates that a live agent should be brought in to handle the
-  // interaction with the user. In most cases, when you set this flag to true,
-  // you would also want to set end_interaction to true as well. Default is
-  // false.
-  bool live_agent_handoff = 20 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates that this intent ends an interaction. Some integrations
-  // (e.g., Actions on Google or Dialogflow phone gateway) use this information
-  // to close interaction with an end user. Default is false.
-  bool end_interaction = 21 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The list of context names required for this intent to be
-  // triggered.
-  // Format: `projects/<Project ID>/agent/sessions/-/contexts/<Context ID>`.
-  repeated string input_context_names = 7 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of event names that trigger the intent.
-  // If the collection of input contexts is not empty, all of the contexts must
-  // be present in the active user session for an event to trigger this intent.
-  // Event names are limited to 150 characters.
-  repeated string events = 8 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of examples that the agent is
-  // trained on.
-  repeated TrainingPhrase training_phrases = 9 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The name of the action associated with the intent.
-  // Note: The action name must not contain whitespaces.
-  string action = 10 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of contexts that are activated when the intent
-  // is matched. Context messages in this collection should not set the
-  // parameters field. Setting the `lifespan_count` to 0 will reset the context
-  // when the intent is matched.
-  // Format: `projects/<Project ID>/agent/sessions/-/contexts/<Context ID>`.
-  repeated Context output_contexts = 11 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates whether to delete all contexts in the current
-  // session when this intent is matched.
-  bool reset_contexts = 12 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of parameters associated with the intent.
-  repeated Parameter parameters = 13 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of rich messages corresponding to the
-  // `Response` field in the Dialogflow console.
-  repeated Message messages = 14 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The list of platforms for which the first responses will be
-  // copied from the messages in PLATFORM_UNSPECIFIED (i.e. default platform).
-  repeated Message.Platform default_response_platforms = 15 [(google.api.field_behavior) = OPTIONAL];
-
-  // Read-only. The unique identifier of the root intent in the chain of
-  // followup intents. It identifies the correct followup intents chain for
-  // this intent. We populate this field only in the output.
-  //
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string root_followup_intent_name = 16;
-
-  // Read-only after creation. The unique identifier of the parent intent in the
-  // chain of followup intents. You can set this field when creating an intent,
-  // for example with [CreateIntent][google.cloud.dialogflow.v2.Intents.CreateIntent] or
-  // [BatchUpdateIntents][google.cloud.dialogflow.v2.Intents.BatchUpdateIntents], in order to make this
-  // intent a followup intent.
-  //
-  // It identifies the parent followup intent.
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string parent_followup_intent_name = 17;
-
-  // Read-only. Information about all followup intents that have this intent as
-  // a direct or indirect parent. We populate this field only in the output.
-  repeated FollowupIntentInfo followup_intent_info = 18;
-}
-
-// The request message for [Intents.ListIntents][google.cloud.dialogflow.v2.Intents.ListIntents].
-message ListIntentsRequest {
-  // Required. The agent to list all intents from.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 5 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Intents.ListIntents][google.cloud.dialogflow.v2.Intents.ListIntents].
-message ListIntentsResponse {
-  // The list of agent intents. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Intent intents = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Intents.GetIntent][google.cloud.dialogflow.v2.Intents.GetIntent].
-message GetIntentRequest {
-  // Required. The name of the intent.
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Intents.CreateIntent][google.cloud.dialogflow.v2.Intents.CreateIntent].
-message CreateIntentRequest {
-  // Required. The agent to create a intent for.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Required. The intent to create.
-  Intent intent = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 4 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Intents.UpdateIntent][google.cloud.dialogflow.v2.Intents.UpdateIntent].
-message UpdateIntentRequest {
-  // Required. The intent to update.
-  Intent intent = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 4 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Intents.DeleteIntent][google.cloud.dialogflow.v2.Intents.DeleteIntent].
-message DeleteIntentRequest {
-  // Required. The name of the intent to delete. If this intent has direct or
-  // indirect followup intents, we also delete them.
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-}
-
-message BatchUpdateIntentsRequest {
-  // Required. The name of the agent to update or create intents in.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // The source of the intent batch.
-  oneof intent_batch {
-    // The URI to a Google Cloud Storage file containing intents to update or
-    // create. The file format can either be a serialized proto (of IntentBatch
-    // type) or JSON object. Note: The URI must start with "gs://".
-    string intent_batch_uri = 2;
-
-    // The collection of intents to update or create.
-    IntentBatch intent_batch_inline = 3;
-  }
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 5 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 6 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Intents.BatchUpdateIntents][google.cloud.dialogflow.v2.Intents.BatchUpdateIntents].
-message BatchUpdateIntentsResponse {
-  // The collection of updated or created intents.
-  repeated Intent intents = 1;
-}
-
-// The request message for [Intents.BatchDeleteIntents][google.cloud.dialogflow.v2.Intents.BatchDeleteIntents].
-message BatchDeleteIntentsRequest {
-  // Required. The name of the agent to delete all entities types for. Format:
-  // `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Required. The collection of intents to delete. Only intent `name` must be
-  // filled in.
-  repeated Intent intents = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// This message is a wrapper around a collection of intents.
-message IntentBatch {
-  // A collection of intents.
-  repeated Intent intents = 1;
-}
-
-// Represents the options for views of an intent.
-// An intent can be a sizable object. Therefore, we provide a resource view that
-// does not return training phrases in the response by default.
-enum IntentView {
-  // Training phrases field is not populated in the response.
-  INTENT_VIEW_UNSPECIFIED = 0;
-
-  // All fields are populated.
-  INTENT_VIEW_FULL = 1;
-}
diff --git a/google/cloud/dialogflow_v2/proto/knowledge_base.proto b/google/cloud/dialogflow_v2/proto/knowledge_base.proto
deleted file mode 100644
index 0b1aa8b3e..000000000
--- a/google/cloud/dialogflow_v2/proto/knowledge_base.proto
+++ /dev/null
@@ -1,234 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "KnowledgeBaseProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [KnowledgeBases][google.cloud.dialogflow.v2.KnowledgeBase].
-service KnowledgeBases {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all knowledge bases of the specified agent.
-  rpc ListKnowledgeBases(ListKnowledgeBasesRequest) returns (ListKnowledgeBasesResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*}/knowledgeBases"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*}/knowledgeBases"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/agent}/knowledgeBases"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified knowledge base.
-  rpc GetKnowledgeBase(GetKnowledgeBaseRequest) returns (KnowledgeBase) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/knowledgeBases/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/knowledgeBases/*}"
-      }
-      additional_bindings {
-        get: "/v2/{name=projects/*/agent/knowledgeBases/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a knowledge base.
-  rpc CreateKnowledgeBase(CreateKnowledgeBaseRequest) returns (KnowledgeBase) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*}/knowledgeBases"
-      body: "knowledge_base"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*}/knowledgeBases"
-        body: "knowledge_base"
-      }
-      additional_bindings {
-        post: "/v2/{parent=projects/*/agent}/knowledgeBases"
-        body: "knowledge_base"
-      }
-    };
-    option (google.api.method_signature) = "parent,knowledge_base";
-  }
-
-  // Deletes the specified knowledge base.
-  rpc DeleteKnowledgeBase(DeleteKnowledgeBaseRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/knowledgeBases/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/knowledgeBases/*}"
-      }
-      additional_bindings {
-        delete: "/v2/{name=projects/*/agent/knowledgeBases/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Updates the specified knowledge base.
-  rpc UpdateKnowledgeBase(UpdateKnowledgeBaseRequest) returns (KnowledgeBase) {
-    option (google.api.http) = {
-      patch: "/v2/{knowledge_base.name=projects/*/knowledgeBases/*}"
-      body: "knowledge_base"
-      additional_bindings {
-        patch: "/v2/{knowledge_base.name=projects/*/locations/*/knowledgeBases/*}"
-        body: "knowledge_base"
-      }
-      additional_bindings {
-        patch: "/v2/{knowledge_base.name=projects/*/agent/knowledgeBases/*}"
-        body: "knowledge_base"
-      }
-    };
-    option (google.api.method_signature) = "knowledge_base,update_mask";
-  }
-}
-
-// A knowledge base represents a collection of knowledge documents that you
-// provide to Dialogflow. Your knowledge documents contain information that may
-// be useful during conversations with end-users. Some Dialogflow features use
-// knowledge bases when looking for a response to an end-user input.
-//
-// For more information, see the [knowledge base
-// guide](https://cloud.google.com/dialogflow/docs/how/knowledge-bases).
-//
-// Note: The `projects.agent.knowledgeBases` resource is deprecated;
-// only use `projects.knowledgeBases`.
-message KnowledgeBase {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/KnowledgeBase"
-    pattern: "projects/{project}/knowledgeBases/{knowledge_base}"
-    pattern: "projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}"
-  };
-
-  // The knowledge base resource name.
-  // The name must be empty when creating a knowledge base.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string name = 1;
-
-  // Required. The display name of the knowledge base. The name must be 1024
-  // bytes or less; otherwise, the creation request fails.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Language which represents the KnowledgeBase. When the KnowledgeBase is
-  // created/updated, expect this to be present for non en-us languages. When
-  // unspecified, the default language code en-us applies.
-  string language_code = 4;
-}
-
-// Request message for [KnowledgeBases.ListKnowledgeBases][google.cloud.dialogflow.v2.KnowledgeBases.ListKnowledgeBases].
-message ListKnowledgeBasesRequest {
-  // Required. The project to list of knowledge bases for.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-
-  // The maximum number of items to return in a single page. By
-  // default 10 and at most 100.
-  int32 page_size = 2;
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// Response message for [KnowledgeBases.ListKnowledgeBases][google.cloud.dialogflow.v2.KnowledgeBases.ListKnowledgeBases].
-message ListKnowledgeBasesResponse {
-  // The list of knowledge bases.
-  repeated KnowledgeBase knowledge_bases = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// Request message for [KnowledgeBases.GetKnowledgeBase][google.cloud.dialogflow.v2.KnowledgeBases.GetKnowledgeBase].
-message GetKnowledgeBaseRequest {
-  // Required. The name of the knowledge base to retrieve.
-  // Format `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-}
-
-// Request message for [KnowledgeBases.CreateKnowledgeBase][google.cloud.dialogflow.v2.KnowledgeBases.CreateKnowledgeBase].
-message CreateKnowledgeBaseRequest {
-  // Required. The project to create a knowledge base for.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-
-  // Required. The knowledge base to create.
-  KnowledgeBase knowledge_base = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Request message for [KnowledgeBases.DeleteKnowledgeBase][google.cloud.dialogflow.v2.KnowledgeBases.DeleteKnowledgeBase].
-message DeleteKnowledgeBaseRequest {
-  // Required. The name of the knowledge base to delete.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-
-  // Optional. Force deletes the knowledge base. When set to true, any documents
-  // in the knowledge base are also deleted.
-  bool force = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Request message for [KnowledgeBases.UpdateKnowledgeBase][google.cloud.dialogflow.v2.KnowledgeBases.UpdateKnowledgeBase].
-message UpdateKnowledgeBaseRequest {
-  // Required. The knowledge base to update.
-  KnowledgeBase knowledge_base = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Not specified means `update all`.
-  // Currently, only `display_name` can be updated, an InvalidArgument will be
-  // returned for attempting to update other fields.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
diff --git a/google/cloud/dialogflow_v2/proto/participant.proto b/google/cloud/dialogflow_v2/proto/participant.proto
deleted file mode 100644
index 91aa04543..000000000
--- a/google/cloud/dialogflow_v2/proto/participant.proto
+++ /dev/null
@@ -1,588 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/audio_config.proto";
-import "google/cloud/dialogflow/v2/session.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-import "google/protobuf/timestamp.proto";
-import "google/rpc/status.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ParticipantProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [Participants][google.cloud.dialogflow.v2.Participant].
-service Participants {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Creates a new participant in a conversation.
-  rpc CreateParticipant(CreateParticipantRequest) returns (Participant) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/conversations/*}/participants"
-      body: "participant"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/conversations/*}/participants"
-        body: "participant"
-      }
-    };
-    option (google.api.method_signature) = "parent,participant";
-  }
-
-  // Retrieves a conversation participant.
-  rpc GetParticipant(GetParticipantRequest) returns (Participant) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/conversations/*/participants/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/conversations/*/participants/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Returns the list of all participants in the specified conversation.
-  rpc ListParticipants(ListParticipantsRequest) returns (ListParticipantsResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/conversations/*}/participants"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/conversations/*}/participants"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Updates the specified participant.
-  rpc UpdateParticipant(UpdateParticipantRequest) returns (Participant) {
-    option (google.api.http) = {
-      patch: "/v2/{participant.name=projects/*/conversations/*/participants/*}"
-      body: "participant"
-      additional_bindings {
-        patch: "/v2/{participant.name=projects/*/locations/*/conversations/*/participants/*}"
-        body: "participant"
-      }
-    };
-    option (google.api.method_signature) = "participant,update_mask";
-  }
-
-  // Adds a text (chat, for example), or audio (phone recording, for example)
-  // message from a participant into the conversation.
-  //
-  // Note: Always use agent versions for production traffic
-  // sent to virtual agents. See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  rpc AnalyzeContent(AnalyzeContentRequest) returns (AnalyzeContentResponse) {
-    option (google.api.http) = {
-      post: "/v2/{participant=projects/*/conversations/*/participants/*}:analyzeContent"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{participant=projects/*/locations/*/conversations/*/participants/*}:analyzeContent"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "participant,text_input";
-    option (google.api.method_signature) = "participant,event_input";
-  }
-
-  // Gets suggested articles for a participant based on specific historical
-  // messages.
-  rpc SuggestArticles(SuggestArticlesRequest) returns (SuggestArticlesResponse) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestArticles"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/conversations/*/participants/*}/suggestions:suggestArticles"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Gets suggested faq answers for a participant based on specific historical
-  // messages.
-  rpc SuggestFaqAnswers(SuggestFaqAnswersRequest) returns (SuggestFaqAnswersResponse) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestFaqAnswers"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/conversations/*/participants/*}/suggestions:suggestFaqAnswers"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-}
-
-// Represents a conversation participant (human agent, virtual agent, end-user).
-message Participant {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Participant"
-    pattern: "projects/{project}/conversations/{conversation}/participants/{participant}"
-    pattern: "projects/{project}/locations/{location}/conversations/{conversation}/participants/{participant}"
-  };
-
-  // Enumeration of the roles a participant can play in a conversation.
-  enum Role {
-    // Participant role not set.
-    ROLE_UNSPECIFIED = 0;
-
-    // Participant is a human agent.
-    HUMAN_AGENT = 1;
-
-    // Participant is an automated agent, such as a Dialogflow agent.
-    AUTOMATED_AGENT = 2;
-
-    // Participant is an end user that has called or chatted with
-    // Dialogflow services.
-    END_USER = 3;
-  }
-
-  // Optional. The unique identifier of this participant.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Immutable. The role this participant plays in the conversation. This field must be set
-  // during participant creation and is then immutable.
-  Role role = 2 [(google.api.field_behavior) = IMMUTABLE];
-
-  // Optional. Label applied to streams representing this participant in SIPREC
-  // XML metadata and SDP. This is used to assign transcriptions from that
-  // media stream to this participant. This field can be updated.
-  string sip_recording_media_label = 6 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Represents a message posted into a conversation.
-message Message {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Message"
-    pattern: "projects/{project}/conversations/{conversation}/messages/{message}"
-    pattern: "projects/{project}/locations/{location}/conversations/{conversation}/messages/{message}"
-  };
-
-  // The unique identifier of the message.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string name = 1;
-
-  // Required. The message content.
-  string content = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The message language.
-  // This should be a [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt)
-  // language tag. Example: "en-US".
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The participant that sends this message.
-  string participant = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The role of the participant.
-  Participant.Role participant_role = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The time when the message was created.
-  google.protobuf.Timestamp create_time = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The annotation for the message.
-  MessageAnnotation message_annotation = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// The request message for [Participants.CreateParticipant][google.cloud.dialogflow.v2.Participants.CreateParticipant].
-message CreateParticipantRequest {
-  // Required. Resource identifier of the conversation adding the participant.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Required. The participant to create.
-  Participant participant = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Participants.GetParticipant][google.cloud.dialogflow.v2.Participants.GetParticipant].
-message GetParticipantRequest {
-  // Required. The name of the participant. Format:
-  // `projects/<Project ID>/locations/<Location ID>/conversations/<Conversation
-  // ID>/participants/<Participant ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-}
-
-// The request message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
-message ListParticipantsRequest {
-  // Required. The conversation to list all participants from.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Participants.ListParticipants][google.cloud.dialogflow.v2.Participants.ListParticipants].
-message ListParticipantsResponse {
-  // The list of participants. There is a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Participant participants = 1;
-
-  // Token to retrieve the next page of results or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Participants.UpdateParticipant][google.cloud.dialogflow.v2.Participants.UpdateParticipant].
-message UpdateParticipantRequest {
-  // Required. The participant to update.
-  Participant participant = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The mask to specify which fields to update.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
-message AnalyzeContentRequest {
-  // Required. The name of the participant this text comes from.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string participant = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Required. The input content.
-  oneof input {
-    // The natural language text to be processed.
-    TextInput text_input = 6;
-
-    // An input event to send to Dialogflow.
-    EventInput event_input = 8;
-  }
-
-  // Speech synthesis configuration.
-  // The speech synthesis settings for a virtual agent that may be configured
-  // for the associated conversation profile are not used when calling
-  // AnalyzeContent. If this configuration is not supplied, speech synthesis
-  // is disabled.
-  OutputAudioConfig reply_audio_config = 5;
-
-  // Parameters for a Dialogflow virtual-agent query.
-  QueryParameters query_params = 9;
-
-  // A unique identifier for this request. Restricted to 36 ASCII characters.
-  // A random UUID is recommended.
-  // This request is only idempotent if a `request_id` is provided.
-  string request_id = 11;
-}
-
-// The message in the response that indicates the parameters of DTMF.
-message DtmfParameters {
-  // Indicates whether DTMF input can be handled in the next request.
-  bool accepts_dtmf_input = 1;
-}
-
-// The response message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent].
-message AnalyzeContentResponse {
-  // The output text content.
-  // This field is set if the automated agent responded with text to show to
-  // the user.
-  string reply_text = 1;
-
-  // The audio data bytes encoded as specified in the request.
-  // This field is set if:
-  //
-  //  - `reply_audio_config` was specified in the request, or
-  //  - The automated agent responded with audio to play to the user. In such
-  //    case, `reply_audio.config` contains settings used to synthesize the
-  //    speech.
-  //
-  // In some scenarios, multiple output audio fields may be present in the
-  // response structure. In these cases, only the top-most-level audio output
-  // has content.
-  OutputAudio reply_audio = 2;
-
-  // Only set if a Dialogflow automated agent has responded.
-  // Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
-  // and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-  // are always empty, use [reply_audio][google.cloud.dialogflow.v2.AnalyzeContentResponse.reply_audio] instead.
-  AutomatedAgentReply automated_agent_reply = 3;
-
-  // Message analyzed by CCAI.
-  Message message = 5;
-
-  // The suggestions for most recent human agent. The order is the same as
-  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
-  // [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.human_agent_suggestion_config].
-  repeated SuggestionResult human_agent_suggestion_results = 6;
-
-  // The suggestions for end user. The order is the same as
-  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
-  // [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2.HumanAgentAssistantConfig.end_user_suggestion_config].
-  repeated SuggestionResult end_user_suggestion_results = 7;
-
-  // Indicates the parameters of DTMF.
-  DtmfParameters dtmf_parameters = 9;
-}
-
-// The request message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
-message SuggestArticlesRequest {
-  // Required. The name of the participant to fetch suggestion for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // The name of the latest conversation message to compile suggestion
-  // for. If empty, it will be the latest message of the conversation.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2 [(google.api.resource_reference) = {
-                               type: "dialogflow.googleapis.com/Message"
-                             }];
-
-  // Max number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2.SuggestArticlesRequest.latest_message] to use as context
-  // when compiling the suggestion. By default 20 and at most 50.
-  int32 context_size = 3;
-}
-
-// The response message for [Participants.SuggestArticles][google.cloud.dialogflow.v2.Participants.SuggestArticles].
-message SuggestArticlesResponse {
-  // Articles ordered by score in descending order.
-  repeated ArticleAnswer article_answers = 1;
-
-  // The name of the latest conversation message used to compile
-  // suggestion for.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2.SuggestArticlesResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestArticlesRequest.context_size][google.cloud.dialogflow.v2.SuggestArticlesRequest.context_size] field in the request if there
-  // aren't that many messages in the conversation.
-  int32 context_size = 3;
-}
-
-// The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
-message SuggestFaqAnswersRequest {
-  // Required. The name of the participant to fetch suggestion for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // The name of the latest conversation message to compile suggestion
-  // for. If empty, it will be the latest message of the conversation.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2 [(google.api.resource_reference) = {
-                               type: "dialogflow.googleapis.com/Message"
-                             }];
-
-  // Max number of messages prior to and including
-  // [latest_message] to use as context when compiling the
-  // suggestion. By default 20 and at most 50.
-  int32 context_size = 3;
-}
-
-// The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2.Participants.SuggestFaqAnswers].
-message SuggestFaqAnswersResponse {
-  // Answers extracted from FAQ documents.
-  repeated FaqAnswer faq_answers = 1;
-
-  // The name of the latest conversation message used to compile
-  // suggestion for.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2.SuggestFaqAnswersResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2.SuggestFaqAnswersRequest.context_size] field in the request if there
-  // aren't that many messages in the conversation.
-  int32 context_size = 3;
-}
-
-// Represents the natural language speech audio to be played to the end user.
-message OutputAudio {
-  // Instructs the speech synthesizer how to generate the speech
-  // audio.
-  OutputAudioConfig config = 1;
-
-  // The natural language speech audio.
-  bytes audio = 2;
-}
-
-// Represents a response from an automated agent.
-message AutomatedAgentReply {
-  // Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2.Sessions.DetectIntent] call.
-  DetectIntentResponse detect_intent_response = 1;
-}
-
-// Represents article answer.
-message ArticleAnswer {
-  // The article title.
-  string title = 1;
-
-  // The article URI.
-  string uri = 2;
-
-  // Article snippets.
-  repeated string snippets = 3;
-
-  // Article match confidence.
-  // The system's confidence score that this article is a good match for this
-  // conversation, as a value from 0.0 (completely uncertain) to 1.0
-  // (completely certain).
-  float confidence = 4;
-
-  // A map that contains metadata about the answer and the
-  // document from which it originates.
-  map<string, string> metadata = 5;
-
-  // The name of answer record, in the format of
-  // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer Record
-  // ID>"
-  string answer_record = 6;
-}
-
-// Represents answer from "frequently asked questions".
-message FaqAnswer {
-  // The piece of text from the `source` knowledge base document.
-  string answer = 1;
-
-  // The system's confidence score that this Knowledge answer is a good match
-  // for this conversational query, range from 0.0 (completely uncertain)
-  // to 1.0 (completely certain).
-  float confidence = 2;
-
-  // The corresponding FAQ question.
-  string question = 3;
-
-  // Indicates which Knowledge Document this answer was extracted
-  // from.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/agent/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string source = 4;
-
-  // A map that contains metadata about the answer and the
-  // document from which it originates.
-  map<string, string> metadata = 5;
-
-  // The name of answer record, in the format of
-  // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer Record
-  // ID>"
-  string answer_record = 6;
-}
-
-// One response of different type of suggestion response which is used in
-// the response of [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] and
-// [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent], as well as [HumanAgentAssistantEvent][google.cloud.dialogflow.v2.HumanAgentAssistantEvent].
-message SuggestionResult {
-  // Different type of suggestion response.
-  oneof suggestion_response {
-    // Error status if the request failed.
-    google.rpc.Status error = 1;
-
-    // SuggestArticlesResponse if request is for ARTICLE_SUGGESTION.
-    SuggestArticlesResponse suggest_articles_response = 2;
-
-    // SuggestFaqAnswersResponse if request is for FAQ_ANSWER.
-    SuggestFaqAnswersResponse suggest_faq_answers_response = 3;
-  }
-}
-
-// Represents a part of a message possibly annotated with an entity. The part
-// can be an entity or purely a part of the message between two entities or
-// message start/end.
-message AnnotatedMessagePart {
-  // A part of a message possibly annotated with an entity.
-  string text = 1;
-
-  // The [Dialogflow system entity
-  // type](https://cloud.google.com/dialogflow/docs/reference/system-entities)
-  // of this message part. If this is empty, Dialogflow could not annotate the
-  // phrase part with a system entity.
-  string entity_type = 2;
-
-  // The [Dialogflow system entity formatted value
-  // ](https://cloud.google.com/dialogflow/docs/reference/system-entities) of
-  // this message part. For example for a system entity of type
-  // `@sys.unit-currency`, this may contain:
-  // <pre>
-  // {
-  //   "amount": 5,
-  //   "currency": "USD"
-  // }
-  // </pre>
-  google.protobuf.Value formatted_value = 3;
-}
-
-// Represents the result of annotation for the message.
-message MessageAnnotation {
-  // The collection of annotated message parts ordered by their
-  // position in the message. You can recover the annotated message by
-  // concatenating [AnnotatedMessagePart.text].
-  repeated AnnotatedMessagePart parts = 1;
-
-  // Indicates whether the text message contains entities.
-  bool contain_entities = 2;
-}
diff --git a/google/cloud/dialogflow_v2/proto/session.proto b/google/cloud/dialogflow_v2/proto/session.proto
deleted file mode 100644
index 13e3abff7..000000000
--- a/google/cloud/dialogflow_v2/proto/session.proto
+++ /dev/null
@@ -1,663 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/audio_config.proto";
-import "google/cloud/dialogflow/v2/context.proto";
-import "google/cloud/dialogflow/v2/intent.proto";
-import "google/cloud/dialogflow/v2/session_entity_type.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-import "google/rpc/status.proto";
-import "google/type/latlng.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "SessionProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-option (google.api.resource_definition) = {
-  type: "dialogflow.googleapis.com/Session"
-  pattern: "projects/{project}/agent/sessions/{session}"
-  pattern: "projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}"
-};
-
-// A service used for session interactions.
-//
-// For more information, see the [API interactions
-// guide](https://cloud.google.com/dialogflow/docs/api-overview).
-service Sessions {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Processes a natural language query and returns structured, actionable data
-  // as a result. This method is not idempotent, because it may cause contexts
-  // and session entity types to be updated, which in turn might affect
-  // results of future queries.
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  rpc DetectIntent(DetectIntentRequest) returns (DetectIntentResponse) {
-    option (google.api.http) = {
-      post: "/v2/{session=projects/*/agent/sessions/*}:detectIntent"
-      body: "*"
-      additional_bindings {
-        post: "/v2/{session=projects/*/agent/environments/*/users/*/sessions/*}:detectIntent"
-        body: "*"
-      }
-      additional_bindings {
-        post: "/v2/{session=projects/*/locations/*/agent/sessions/*}:detectIntent"
-        body: "*"
-      }
-      additional_bindings {
-        post: "/v2/{session=projects/*/locations/*/agent/environments/*/users/*/sessions/*}:detectIntent"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "session,query_input";
-  }
-
-  // Processes a natural language query in audio format in a streaming fashion
-  // and returns structured, actionable data as a result. This method is only
-  // available via the gRPC API (not REST).
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  rpc StreamingDetectIntent(stream StreamingDetectIntentRequest) returns (stream StreamingDetectIntentResponse) {
-  }
-}
-
-// The request to detect user's intent.
-message DetectIntentRequest {
-  // Required. The name of the session this query is sent to. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>`, or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>`. If `Environment ID` is not specified, we assume
-  // default 'draft' environment (`Environment ID` might be referred to as
-  // environment name at some places). If `User ID` is not specified, we are
-  // using "-". It's up to the API caller to choose an appropriate `Session ID`
-  // and `User Id`. They can be a random number or some type of user and session
-  // identifiers (preferably hashed). The length of the `Session ID` and
-  // `User ID` must not exceed 36 characters.
-  //
-  // For more information, see the [API interactions
-  // guide](https://cloud.google.com/dialogflow/docs/api-overview).
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  string session = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Session"
-    }
-  ];
-
-  // The parameters of this query.
-  QueryParameters query_params = 2;
-
-  // Required. The input specification. It can be set to:
-  //
-  // 1.  an audio config
-  //     which instructs the speech recognizer how to process the speech audio,
-  //
-  // 2.  a conversational query in the form of text, or
-  //
-  // 3.  an event that specifies which intent to trigger.
-  QueryInput query_input = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Instructs the speech synthesizer how to generate the output
-  // audio. If this field is not set and agent-level speech synthesizer is not
-  // configured, no output audio is generated.
-  OutputAudioConfig output_audio_config = 4;
-
-  // Mask for [output_audio_config][google.cloud.dialogflow.v2.DetectIntentRequest.output_audio_config] indicating which settings in this
-  // request-level config should override speech synthesizer settings defined at
-  // agent-level.
-  //
-  // If unspecified or empty, [output_audio_config][google.cloud.dialogflow.v2.DetectIntentRequest.output_audio_config] replaces the agent-level
-  // config in its entirety.
-  google.protobuf.FieldMask output_audio_config_mask = 7;
-
-  // The natural language speech audio to be processed. This field
-  // should be populated iff `query_input` is set to an input audio config.
-  // A single request can contain up to 1 minute of speech audio data.
-  bytes input_audio = 5;
-}
-
-// The message returned from the DetectIntent method.
-message DetectIntentResponse {
-  // The unique identifier of the response. It can be used to
-  // locate a response in the training example set or for reporting issues.
-  string response_id = 1;
-
-  // The selected results of the conversational query or event processing.
-  // See `alternative_query_results` for additional potential results.
-  QueryResult query_result = 2;
-
-  // Specifies the status of the webhook request.
-  google.rpc.Status webhook_status = 3;
-
-  // The audio data bytes encoded as specified in the request.
-  // Note: The output audio is generated based on the values of default platform
-  // text responses found in the `query_result.fulfillment_messages` field. If
-  // multiple default text responses exist, they will be concatenated when
-  // generating audio. If no default platform text responses exist, the
-  // generated audio content will be empty.
-  //
-  // In some scenarios, multiple output audio fields may be present in the
-  // response structure. In these cases, only the top-most-level audio output
-  // has content.
-  bytes output_audio = 4;
-
-  // The config used by the speech synthesizer to generate the output audio.
-  OutputAudioConfig output_audio_config = 6;
-}
-
-// Represents the parameters of the conversational query.
-message QueryParameters {
-  // The time zone of this conversational query from the
-  // [time zone database](https://www.iana.org/time-zones), e.g.,
-  // America/New_York, Europe/Paris. If not provided, the time zone specified in
-  // agent settings is used.
-  string time_zone = 1;
-
-  // The geo location of this conversational query.
-  google.type.LatLng geo_location = 2;
-
-  // The collection of contexts to be activated before this query is
-  // executed.
-  repeated Context contexts = 3;
-
-  // Specifies whether to delete all contexts in the current session
-  // before the new ones are activated.
-  bool reset_contexts = 4;
-
-  // Additional session entity types to replace or extend developer
-  // entity types with. The entity synonyms apply to all languages and persist
-  // for the session of this query.
-  repeated SessionEntityType session_entity_types = 5;
-
-  // This field can be used to pass custom data to your webhook.
-  // Arbitrary JSON objects are supported.
-  // If supplied, the value is used to populate the
-  // `WebhookRequest.original_detect_intent_request.payload`
-  // field sent to your webhook.
-  google.protobuf.Struct payload = 6;
-
-  // Configures the type of sentiment analysis to perform. If not
-  // provided, sentiment analysis is not performed.
-  SentimentAnalysisRequestConfig sentiment_analysis_request_config = 10;
-
-  // This field can be used to pass HTTP headers for a webhook
-  // call. These headers will be sent to webhook along with the headers that
-  // have been configured through the Dialogflow web console. The headers
-  // defined within this field will overwrite the headers configured through the
-  // Dialogflow console if there is a conflict. Header names are
-  // case-insensitive. Google's specified headers are not allowed. Including:
-  // "Host", "Content-Length", "Connection", "From", "User-Agent",
-  // "Accept-Encoding", "If-Modified-Since", "If-None-Match", "X-Forwarded-For",
-  // etc.
-  map<string, string> webhook_headers = 14;
-}
-
-// Represents the query input. It can contain either:
-//
-// 1.  An audio config which
-//     instructs the speech recognizer how to process the speech audio.
-//
-// 2.  A conversational query in the form of text,.
-//
-// 3.  An event that specifies which intent to trigger.
-message QueryInput {
-  // Required. The input specification.
-  oneof input {
-    // Instructs the speech recognizer how to process the speech audio.
-    InputAudioConfig audio_config = 1;
-
-    // The natural language text to be processed.
-    TextInput text = 2;
-
-    // The event to be processed.
-    EventInput event = 3;
-  }
-}
-
-// Represents the result of conversational query or event processing.
-message QueryResult {
-  // The original conversational query text:
-  //
-  // - If natural language text was provided as input, `query_text` contains
-  //   a copy of the input.
-  // - If natural language speech audio was provided as input, `query_text`
-  //   contains the speech recognition result. If speech recognizer produced
-  //   multiple alternatives, a particular one is picked.
-  // - If automatic spell correction is enabled, `query_text` will contain the
-  //   corrected user input.
-  string query_text = 1;
-
-  // The language that was triggered during intent detection.
-  // See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes.
-  string language_code = 15;
-
-  // The Speech recognition confidence between 0.0 and 1.0. A higher number
-  // indicates an estimated greater likelihood that the recognized words are
-  // correct. The default of 0.0 is a sentinel value indicating that confidence
-  // was not set.
-  //
-  // This field is not guaranteed to be accurate or set. In particular this
-  // field isn't set for StreamingDetectIntent since the streaming endpoint has
-  // separate confidence estimates per portion of the audio in
-  // StreamingRecognitionResult.
-  float speech_recognition_confidence = 2;
-
-  // The action name from the matched intent.
-  string action = 3;
-
-  // The collection of extracted parameters.
-  //
-  // Depending on your protocol or client library language, this is a
-  // map, associative array, symbol table, dictionary, or JSON object
-  // composed of a collection of (MapKey, MapValue) pairs:
-  //
-  // -   MapKey type: string
-  // -   MapKey value: parameter name
-  // -   MapValue type:
-  //     -   If parameter's entity type is a composite entity: map
-  //     -   Else: depending on parameter value type, could be one of string,
-  //         number, boolean, null, list or map
-  // -   MapValue value:
-  //     -   If parameter's entity type is a composite entity:
-  //         map from composite entity property names to property values
-  //     -   Else: parameter value
-  google.protobuf.Struct parameters = 4;
-
-  // This field is set to:
-  //
-  // - `false` if the matched intent has required parameters and not all of
-  //    the required parameter values have been collected.
-  // - `true` if all required parameter values have been collected, or if the
-  //    matched intent doesn't contain any required parameters.
-  bool all_required_params_present = 5;
-
-  // The text to be pronounced to the user or shown on the screen.
-  // Note: This is a legacy field, `fulfillment_messages` should be preferred.
-  string fulfillment_text = 6;
-
-  // The collection of rich messages to present to the user.
-  repeated Intent.Message fulfillment_messages = 7;
-
-  // If the query was fulfilled by a webhook call, this field is set to the
-  // value of the `source` field returned in the webhook response.
-  string webhook_source = 8;
-
-  // If the query was fulfilled by a webhook call, this field is set to the
-  // value of the `payload` field returned in the webhook response.
-  google.protobuf.Struct webhook_payload = 9;
-
-  // The collection of output contexts. If applicable,
-  // `output_contexts.parameters` contains entries with name
-  // `<parameter name>.original` containing the original parameter values
-  // before the query.
-  repeated Context output_contexts = 10;
-
-  // The intent that matched the conversational query. Some, not
-  // all fields are filled in this message, including but not limited to:
-  // `name`, `display_name`, `end_interaction` and `is_fallback`.
-  Intent intent = 11;
-
-  // The intent detection confidence. Values range from 0.0
-  // (completely uncertain) to 1.0 (completely certain).
-  // This value is for informational purpose only and is only used to
-  // help match the best intent within the classification threshold.
-  // This value may change for the same end-user expression at any time due to a
-  // model retraining or change in implementation.
-  // If there are `multiple knowledge_answers` messages, this value is set to
-  // the greatest `knowledgeAnswers.match_confidence` value in the list.
-  float intent_detection_confidence = 12;
-
-  // Free-form diagnostic information for the associated detect intent request.
-  // The fields of this data can change without notice, so you should not write
-  // code that depends on its structure.
-  // The data may contain:
-  //
-  // - webhook call latency
-  // - webhook errors
-  google.protobuf.Struct diagnostic_info = 14;
-
-  // The sentiment analysis result, which depends on the
-  // `sentiment_analysis_request_config` specified in the request.
-  SentimentAnalysisResult sentiment_analysis_result = 17;
-}
-
-// The top-level message sent by the client to the
-// [Sessions.StreamingDetectIntent][google.cloud.dialogflow.v2.Sessions.StreamingDetectIntent] method.
-//
-// Multiple request messages should be sent in order:
-//
-// 1.  The first message must contain
-// [session][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.session],
-//     [query_input][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.query_input] plus optionally
-//     [query_params][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.query_params]. If the client
-//     wants to receive an audio response, it should also contain
-//     [output_audio_config][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.output_audio_config].
-//     The message must not contain
-//     [input_audio][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.input_audio].
-// 2.  If [query_input][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.query_input] was set to
-//     [query_input.audio_config][google.cloud.dialogflow.v2.InputAudioConfig], all subsequent
-//     messages must contain
-//     [input_audio][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.input_audio] to continue with
-//     Speech recognition.
-//     If you decide to rather detect an intent from text input after you
-//     already started Speech recognition, please send a message with
-//     [query_input.text][google.cloud.dialogflow.v2.QueryInput.text].
-//
-//     However, note that:
-//
-//     * Dialogflow will bill you for the audio duration so far.
-//     * Dialogflow discards all Speech recognition results in favor of the
-//       input text.
-//     * Dialogflow will use the language code from the first message.
-//
-// After you sent all input, you must half-close or abort the request stream.
-message StreamingDetectIntentRequest {
-  // Required. The name of the session the query is sent to.
-  // Format of the session name:
-  // `projects/<Project ID>/agent/sessions/<Session ID>`, or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>`. If `Environment ID` is not specified, we assume
-  // default 'draft' environment. If `User ID` is not specified, we are using
-  // "-". It's up to the API caller to choose an appropriate `Session ID` and
-  // `User Id`. They can be a random number or some type of user and session
-  // identifiers (preferably hashed). The length of the `Session ID` and
-  // `User ID` must not exceed 36 characters.
-  //
-  // For more information, see the [API interactions
-  // guide](https://cloud.google.com/dialogflow/docs/api-overview).
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  string session = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Session"
-    }
-  ];
-
-  // The parameters of this query.
-  QueryParameters query_params = 2;
-
-  // Required. The input specification. It can be set to:
-  //
-  // 1.  an audio config which instructs the speech recognizer how to process
-  //     the speech audio,
-  //
-  // 2.  a conversational query in the form of text, or
-  //
-  // 3.  an event that specifies which intent to trigger.
-  QueryInput query_input = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Please use [InputAudioConfig.single_utterance][google.cloud.dialogflow.v2.InputAudioConfig.single_utterance] instead.
-  // If `false` (default), recognition does not cease until
-  // the client closes the stream. If `true`, the recognizer will detect a
-  // single spoken utterance in input audio. Recognition ceases when it detects
-  // the audio's voice has stopped or paused. In this case, once a detected
-  // intent is received, the client should close the stream and start a new
-  // request with a new stream as needed.
-  // This setting is ignored when `query_input` is a piece of text or an event.
-  bool single_utterance = 4 [deprecated = true];
-
-  // Instructs the speech synthesizer how to generate the output
-  // audio. If this field is not set and agent-level speech synthesizer is not
-  // configured, no output audio is generated.
-  OutputAudioConfig output_audio_config = 5;
-
-  // Mask for [output_audio_config][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.output_audio_config] indicating which settings in this
-  // request-level config should override speech synthesizer settings defined at
-  // agent-level.
-  //
-  // If unspecified or empty, [output_audio_config][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.output_audio_config] replaces the agent-level
-  // config in its entirety.
-  google.protobuf.FieldMask output_audio_config_mask = 7;
-
-  // The input audio content to be recognized. Must be sent if
-  // `query_input` was set to a streaming input audio config. The complete audio
-  // over all streaming messages must not exceed 1 minute.
-  bytes input_audio = 6;
-}
-
-// The top-level message returned from the
-// `StreamingDetectIntent` method.
-//
-// Multiple response messages can be returned in order:
-//
-// 1.  If the input was set to streaming audio, the first one or more messages
-//     contain `recognition_result`. Each `recognition_result` represents a more
-//     complete transcript of what the user said. The last `recognition_result`
-//     has `is_final` set to `true`.
-//
-// 2.  The next message contains `response_id`, `query_result`
-//     and optionally `webhook_status` if a WebHook was called.
-message StreamingDetectIntentResponse {
-  // The unique identifier of the response. It can be used to
-  // locate a response in the training example set or for reporting issues.
-  string response_id = 1;
-
-  // The result of speech recognition.
-  StreamingRecognitionResult recognition_result = 2;
-
-  // The result of the conversational query or event processing.
-  QueryResult query_result = 3;
-
-  // Specifies the status of the webhook request.
-  google.rpc.Status webhook_status = 4;
-
-  // The audio data bytes encoded as specified in the request.
-  // Note: The output audio is generated based on the values of default platform
-  // text responses found in the `query_result.fulfillment_messages` field. If
-  // multiple default text responses exist, they will be concatenated when
-  // generating audio. If no default platform text responses exist, the
-  // generated audio content will be empty.
-  //
-  // In some scenarios, multiple output audio fields may be present in the
-  // response structure. In these cases, only the top-most-level audio output
-  // has content.
-  bytes output_audio = 5;
-
-  // The config used by the speech synthesizer to generate the output audio.
-  OutputAudioConfig output_audio_config = 6;
-}
-
-// Contains a speech recognition result corresponding to a portion of the audio
-// that is currently being processed or an indication that this is the end
-// of the single requested utterance.
-//
-// Example:
-//
-// 1.  transcript: "tube"
-//
-// 2.  transcript: "to be a"
-//
-// 3.  transcript: "to be"
-//
-// 4.  transcript: "to be or not to be"
-//     is_final: true
-//
-// 5.  transcript: " that's"
-//
-// 6.  transcript: " that is"
-//
-// 7.  message_type: `END_OF_SINGLE_UTTERANCE`
-//
-// 8.  transcript: " that is the question"
-//     is_final: true
-//
-// Only two of the responses contain final results (#4 and #8 indicated by
-// `is_final: true`). Concatenating these generates the full transcript: "to be
-// or not to be that is the question".
-//
-// In each response we populate:
-//
-// *  for `TRANSCRIPT`: `transcript` and possibly `is_final`.
-//
-// *  for `END_OF_SINGLE_UTTERANCE`: only `message_type`.
-message StreamingRecognitionResult {
-  // Type of the response message.
-  enum MessageType {
-    // Not specified. Should never be used.
-    MESSAGE_TYPE_UNSPECIFIED = 0;
-
-    // Message contains a (possibly partial) transcript.
-    TRANSCRIPT = 1;
-
-    // Event indicates that the server has detected the end of the user's speech
-    // utterance and expects no additional inputs.
-    // Therefore, the server will not process additional audio (although it may subsequently return additional results). The
-    // client should stop sending additional audio data, half-close the gRPC
-    // connection, and wait for any additional results until the server closes
-    // the gRPC connection. This message is only sent if `single_utterance` was
-    // set to `true`, and is not used otherwise.
-    END_OF_SINGLE_UTTERANCE = 2;
-  }
-
-  // Type of the result message.
-  MessageType message_type = 1;
-
-  // Transcript text representing the words that the user spoke.
-  // Populated if and only if `message_type` = `TRANSCRIPT`.
-  string transcript = 2;
-
-  // If `false`, the `StreamingRecognitionResult` represents an
-  // interim result that may change. If `true`, the recognizer will not return
-  // any further hypotheses about this piece of the audio. May only be populated
-  // for `message_type` = `TRANSCRIPT`.
-  bool is_final = 3;
-
-  // The Speech confidence between 0.0 and 1.0 for the current portion of audio.
-  // A higher number indicates an estimated greater likelihood that the
-  // recognized words are correct. The default of 0.0 is a sentinel value
-  // indicating that confidence was not set.
-  //
-  // This field is typically only provided if `is_final` is true and you should
-  // not rely on it being accurate or even set.
-  float confidence = 4;
-
-  // Word-specific information for the words recognized by Speech in
-  // [transcript][google.cloud.dialogflow.v2.StreamingRecognitionResult.transcript]. Populated if and only if `message_type` = `TRANSCRIPT` and
-  // [InputAudioConfig.enable_word_info] is set.
-  repeated SpeechWordInfo speech_word_info = 7;
-
-  // Time offset of the end of this Speech recognition result relative to the
-  // beginning of the audio. Only populated for `message_type` = `TRANSCRIPT`.
-  google.protobuf.Duration speech_end_offset = 8;
-}
-
-// Represents the natural language text to be processed.
-message TextInput {
-  // Required. The UTF-8 encoded natural language text to be processed.
-  // Text length must not exceed 256 characters.
-  string text = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The language of this conversational query. See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. Note that queries in
-  // the same session do not necessarily need to specify the same language.
-  string language_code = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Events allow for matching intents by event name instead of the natural
-// language input. For instance, input `<event: { name: "welcome_event",
-// parameters: { name: "Sam" } }>` can trigger a personalized welcome response.
-// The parameter `name` may be used by the agent in the response:
-// `"Hello #welcome_event.name! What can I do for you today?"`.
-message EventInput {
-  // Required. The unique identifier of the event.
-  string name = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // The collection of parameters associated with the event.
-  //
-  // Depending on your protocol or client library language, this is a
-  // map, associative array, symbol table, dictionary, or JSON object
-  // composed of a collection of (MapKey, MapValue) pairs:
-  //
-  // -   MapKey type: string
-  // -   MapKey value: parameter name
-  // -   MapValue type:
-  //     -   If parameter's entity type is a composite entity: map
-  //     -   Else: depending on parameter value type, could be one of string,
-  //         number, boolean, null, list or map
-  // -   MapValue value:
-  //     -   If parameter's entity type is a composite entity:
-  //         map from composite entity property names to property values
-  //     -   Else: parameter value
-  google.protobuf.Struct parameters = 2;
-
-  // Required. The language of this query. See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. Note that queries in
-  // the same session do not necessarily need to specify the same language.
-  string language_code = 3 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Configures the types of sentiment analysis to perform.
-message SentimentAnalysisRequestConfig {
-  // Instructs the service to perform sentiment analysis on
-  // `query_text`. If not provided, sentiment analysis is not performed on
-  // `query_text`.
-  bool analyze_query_text_sentiment = 1;
-}
-
-// The result of sentiment analysis. Sentiment analysis inspects user input
-// and identifies the prevailing subjective opinion, especially to determine a
-// user's attitude as positive, negative, or neutral.
-// For [Participants.DetectIntent][], it needs to be configured in
-// [DetectIntentRequest.query_params][google.cloud.dialogflow.v2.DetectIntentRequest.query_params]. For
-// [Participants.StreamingDetectIntent][], it needs to be configured in
-// [StreamingDetectIntentRequest.query_params][google.cloud.dialogflow.v2.StreamingDetectIntentRequest.query_params].
-// And for [Participants.AnalyzeContent][google.cloud.dialogflow.v2.Participants.AnalyzeContent] and
-// [Participants.StreamingAnalyzeContent][google.cloud.dialogflow.v2.Participants.StreamingAnalyzeContent], it needs to be configured in
-// [ConversationProfile.human_agent_assistant_config][google.cloud.dialogflow.v2.ConversationProfile.human_agent_assistant_config]
-message SentimentAnalysisResult {
-  // The sentiment analysis result for `query_text`.
-  Sentiment query_text_sentiment = 1;
-}
-
-// The sentiment, such as positive/negative feeling or association, for a unit
-// of analysis, such as the query text.
-message Sentiment {
-  // Sentiment score between -1.0 (negative sentiment) and 1.0 (positive
-  // sentiment).
-  float score = 1;
-
-  // A non-negative number in the [0, +inf) range, which represents the absolute
-  // magnitude of sentiment, regardless of score (positive or negative).
-  float magnitude = 2;
-}
diff --git a/google/cloud/dialogflow_v2/proto/session_entity_type.proto b/google/cloud/dialogflow_v2/proto/session_entity_type.proto
deleted file mode 100644
index cac38be77..000000000
--- a/google/cloud/dialogflow_v2/proto/session_entity_type.proto
+++ /dev/null
@@ -1,311 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2/entity_type.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "SessionEntityTypeProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Service for managing [SessionEntityTypes][google.cloud.dialogflow.v2.SessionEntityType].
-service SessionEntityTypes {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all session entity types in the specified session.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc ListSessionEntityTypes(ListSessionEntityTypesRequest) returns (ListSessionEntityTypesResponse) {
-    option (google.api.http) = {
-      get: "/v2/{parent=projects/*/agent/sessions/*}/entityTypes"
-      additional_bindings {
-        get: "/v2/{parent=projects/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent/sessions/*}/entityTypes"
-      }
-      additional_bindings {
-        get: "/v2/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc GetSessionEntityType(GetSessionEntityTypeRequest) returns (SessionEntityType) {
-    option (google.api.http) = {
-      get: "/v2/{name=projects/*/agent/sessions/*/entityTypes/*}"
-      additional_bindings {
-        get: "/v2/{name=projects/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/agent/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        get: "/v2/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a session entity type.
-  //
-  // If the specified session entity type already exists, overrides the session
-  // entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc CreateSessionEntityType(CreateSessionEntityTypeRequest) returns (SessionEntityType) {
-    option (google.api.http) = {
-      post: "/v2/{parent=projects/*/agent/sessions/*}/entityTypes"
-      body: "session_entity_type"
-      additional_bindings {
-        post: "/v2/{parent=projects/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/sessions/*}/entityTypes"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        post: "/v2/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-        body: "session_entity_type"
-      }
-    };
-    option (google.api.method_signature) = "parent,session_entity_type";
-  }
-
-  // Updates the specified session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc UpdateSessionEntityType(UpdateSessionEntityTypeRequest) returns (SessionEntityType) {
-    option (google.api.http) = {
-      patch: "/v2/{session_entity_type.name=projects/*/agent/sessions/*/entityTypes/*}"
-      body: "session_entity_type"
-      additional_bindings {
-        patch: "/v2/{session_entity_type.name=projects/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        patch: "/v2/{session_entity_type.name=projects/*/locations/*/agent/sessions/*/entityTypes/*}"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        patch: "/v2/{session_entity_type.name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-        body: "session_entity_type"
-      }
-    };
-    option (google.api.method_signature) = "session_entity_type";
-    option (google.api.method_signature) = "session_entity_type,update_mask";
-  }
-
-  // Deletes the specified session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc DeleteSessionEntityType(DeleteSessionEntityTypeRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2/{name=projects/*/agent/sessions/*/entityTypes/*}"
-      additional_bindings {
-        delete: "/v2/{name=projects/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/agent/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        delete: "/v2/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-}
-
-// A session represents a conversation between a Dialogflow agent and an
-// end-user. You can create special entities, called session entities, during a
-// session. Session entities can extend or replace custom entity types and only
-// exist during the session that they were created for. All session data,
-// including session entities, is stored by Dialogflow for 20 minutes.
-//
-// For more information, see the [session entity
-// guide](https://cloud.google.com/dialogflow/docs/entities-session).
-message SessionEntityType {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/SessionEntityType"
-    pattern: "projects/{project}/agent/sessions/{session}/entityTypes/{entity_type}"
-    pattern: "projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}/entityTypes/{entity_type}"
-  };
-
-  // The types of modifications for a session entity type.
-  enum EntityOverrideMode {
-    // Not specified. This value should be never used.
-    ENTITY_OVERRIDE_MODE_UNSPECIFIED = 0;
-
-    // The collection of session entities overrides the collection of entities
-    // in the corresponding custom entity type.
-    ENTITY_OVERRIDE_MODE_OVERRIDE = 1;
-
-    // The collection of session entities extends the collection of entities in
-    // the corresponding custom entity type.
-    //
-    // Note: Even in this override mode calls to `ListSessionEntityTypes`,
-    // `GetSessionEntityType`, `CreateSessionEntityType` and
-    // `UpdateSessionEntityType` only return the additional entities added in
-    // this session entity type. If you want to get the supplemented list,
-    // please call [EntityTypes.GetEntityType][google.cloud.dialogflow.v2.EntityTypes.GetEntityType] on the custom entity type
-    // and merge.
-    ENTITY_OVERRIDE_MODE_SUPPLEMENT = 2;
-  }
-
-  // Required. The unique identifier of this session entity type. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type
-  // Display Name>`, or `projects/<Project ID>/agent/environments/<Environment
-  // ID>/users/<User ID>/sessions/<Session ID>/entityTypes/<Entity Type Display
-  // Name>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  //
-  // `<Entity Type Display Name>` must be the display name of an existing entity
-  // type in the same agent that will be overridden or supplemented.
-  string name = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. Indicates whether the additional data should override or
-  // supplement the custom entity type definition.
-  EntityOverrideMode entity_override_mode = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The collection of entities associated with this session entity
-  // type.
-  repeated EntityType.Entity entities = 3 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [SessionEntityTypes.ListSessionEntityTypes][google.cloud.dialogflow.v2.SessionEntityTypes.ListSessionEntityTypes].
-message ListSessionEntityTypesRequest {
-  // Required. The session to list all session entity types from.
-  // Format: `projects/<Project ID>/agent/sessions/<Session ID>` or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/
-  // sessions/<Session ID>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [SessionEntityTypes.ListSessionEntityTypes][google.cloud.dialogflow.v2.SessionEntityTypes.ListSessionEntityTypes].
-message ListSessionEntityTypesResponse {
-  // The list of session entity types. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated SessionEntityType session_entity_types = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [SessionEntityTypes.GetSessionEntityType][google.cloud.dialogflow.v2.SessionEntityTypes.GetSessionEntityType].
-message GetSessionEntityTypeRequest {
-  // Required. The name of the session entity type. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type
-  // Display Name>` or `projects/<Project ID>/agent/environments/<Environment
-  // ID>/users/<User ID>/sessions/<Session ID>/entityTypes/<Entity Type Display
-  // Name>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-}
-
-// The request message for [SessionEntityTypes.CreateSessionEntityType][google.cloud.dialogflow.v2.SessionEntityTypes.CreateSessionEntityType].
-message CreateSessionEntityTypeRequest {
-  // Required. The session to create a session entity type for.
-  // Format: `projects/<Project ID>/agent/sessions/<Session ID>` or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User ID>/
-  // sessions/<Session ID>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-
-  // Required. The session entity type to create.
-  SessionEntityType session_entity_type = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [SessionEntityTypes.UpdateSessionEntityType][google.cloud.dialogflow.v2.SessionEntityTypes.UpdateSessionEntityType].
-message UpdateSessionEntityTypeRequest {
-  // Required. The session entity type to update.
-  SessionEntityType session_entity_type = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [SessionEntityTypes.DeleteSessionEntityType][google.cloud.dialogflow.v2.SessionEntityTypes.DeleteSessionEntityType].
-message DeleteSessionEntityTypeRequest {
-  // Required. The name of the entity type to delete. Format:
-  // `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity Type
-  // Display Name>` or `projects/<Project ID>/agent/environments/<Environment
-  // ID>/users/<User ID>/sessions/<Session ID>/entityTypes/<Entity Type Display
-  // Name>`.
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-}
diff --git a/google/cloud/dialogflow_v2/proto/validation_result.proto b/google/cloud/dialogflow_v2/proto/validation_result.proto
deleted file mode 100644
index e41cb9cde..000000000
--- a/google/cloud/dialogflow_v2/proto/validation_result.proto
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ValidationResultProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// Represents a single validation error.
-message ValidationError {
-  // Represents a level of severity.
-  enum Severity {
-    // Not specified. This value should never be used.
-    SEVERITY_UNSPECIFIED = 0;
-
-    // The agent doesn't follow Dialogflow best practices.
-    INFO = 1;
-
-    // The agent may not behave as expected.
-    WARNING = 2;
-
-    // The agent may experience partial failures.
-    ERROR = 3;
-
-    // The agent may completely fail.
-    CRITICAL = 4;
-  }
-
-  // The severity of the error.
-  Severity severity = 1;
-
-  // The names of the entries that the error is associated with.
-  // Format:
-  //
-  // - "projects/<Project ID>/agent", if the error is associated with the entire
-  // agent.
-  // - "projects/<Project ID>/agent/intents/<Intent ID>", if the error is
-  // associated with certain intents.
-  // - "projects/<Project
-  // ID>/agent/intents/<Intent Id>/trainingPhrases/<Training Phrase ID>", if the
-  // error is associated with certain intent training phrases.
-  // - "projects/<Project ID>/agent/intents/<Intent Id>/parameters/<Parameter
-  // ID>", if the error is associated with certain intent parameters.
-  // - "projects/<Project ID>/agent/entities/<Entity ID>", if the error is
-  // associated with certain entities.
-  repeated string entries = 3;
-
-  // The detailed error messsage.
-  string error_message = 4;
-}
-
-// Represents the output of agent validation.
-message ValidationResult {
-  // Contains all validation errors.
-  repeated ValidationError validation_errors = 1;
-}
diff --git a/google/cloud/dialogflow_v2/proto/webhook.proto b/google/cloud/dialogflow_v2/proto/webhook.proto
deleted file mode 100644
index ce72e92d3..000000000
--- a/google/cloud/dialogflow_v2/proto/webhook.proto
+++ /dev/null
@@ -1,145 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2;
-
-import "google/cloud/dialogflow/v2/context.proto";
-import "google/cloud/dialogflow/v2/intent.proto";
-import "google/cloud/dialogflow/v2/session.proto";
-import "google/cloud/dialogflow/v2/session_entity_type.proto";
-import "google/protobuf/struct.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "WebhookProto";
-option java_package = "com.google.cloud.dialogflow.v2";
-option objc_class_prefix = "DF";
-
-// The request message for a webhook call.
-message WebhookRequest {
-  // The unique identifier of detectIntent request session.
-  // Can be used to identify end-user inside webhook implementation.
-  // Format: `projects/<Project ID>/agent/sessions/<Session ID>`, or
-  // `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  // ID>/sessions/<Session ID>`.
-  string session = 4;
-
-  // The unique identifier of the response. Contains the same value as
-  // `[Streaming]DetectIntentResponse.response_id`.
-  string response_id = 1;
-
-  // The result of the conversational query or event processing. Contains the
-  // same value as `[Streaming]DetectIntentResponse.query_result`.
-  QueryResult query_result = 2;
-
-  // Optional. The contents of the original request that was passed to
-  // `[Streaming]DetectIntent` call.
-  OriginalDetectIntentRequest original_detect_intent_request = 3;
-}
-
-// The response message for a webhook call.
-//
-// This response is validated by the Dialogflow server. If validation fails,
-// an error will be returned in the [QueryResult.diagnostic_info][google.cloud.dialogflow.v2.QueryResult.diagnostic_info] field.
-// Setting JSON fields to an empty value with the wrong type is a common error.
-// To avoid this error:
-//
-// - Use `""` for empty strings
-// - Use `{}` or `null` for empty objects
-// - Use `[]` or `null` for empty arrays
-//
-// For more information, see the
-// [Protocol Buffers Language
-// Guide](https://developers.google.com/protocol-buffers/docs/proto3#json).
-message WebhookResponse {
-  // Optional. The text response message intended for the end-user.
-  // It is recommended to use `fulfillment_messages.text.text[0]` instead.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.fulfillment_text][google.cloud.dialogflow.v2.QueryResult.fulfillment_text] sent to the integration or API caller.
-  string fulfillment_text = 1;
-
-  // Optional. The rich response messages intended for the end-user.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.fulfillment_messages][google.cloud.dialogflow.v2.QueryResult.fulfillment_messages] sent to the integration or API caller.
-  repeated Intent.Message fulfillment_messages = 2;
-
-  // Optional. A custom field used to identify the webhook source.
-  // Arbitrary strings are supported.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.webhook_source][google.cloud.dialogflow.v2.QueryResult.webhook_source] sent to the integration or API caller.
-  string source = 3;
-
-  // Optional. This field can be used to pass custom data from your webhook to the
-  // integration or API caller. Arbitrary JSON objects are supported.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.webhook_payload][google.cloud.dialogflow.v2.QueryResult.webhook_payload] sent to the integration or API caller.
-  // This field is also used by the
-  // [Google Assistant
-  // integration](https://cloud.google.com/dialogflow/docs/integrations/aog)
-  // for rich response messages.
-  // See the format definition at [Google Assistant Dialogflow webhook
-  // format](https://developers.google.com/assistant/actions/build/json/dialogflow-webhook-json)
-  google.protobuf.Struct payload = 4;
-
-  // Optional. The collection of output contexts that will overwrite currently
-  // active contexts for the session and reset their lifespans.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.output_contexts][google.cloud.dialogflow.v2.QueryResult.output_contexts] sent to the integration or API caller.
-  repeated Context output_contexts = 5;
-
-  // Optional. Invokes the supplied events.
-  // When this field is set, Dialogflow ignores the `fulfillment_text`,
-  // `fulfillment_messages`, and `payload` fields.
-  EventInput followup_event_input = 6;
-
-  // Optional. Additional session entity types to replace or extend developer
-  // entity types with. The entity synonyms apply to all languages and persist
-  // for the session. Setting this data from a webhook overwrites
-  // the session entity types that have been set using `detectIntent`,
-  // `streamingDetectIntent` or [SessionEntityType][google.cloud.dialogflow.v2.SessionEntityType] management methods.
-  repeated SessionEntityType session_entity_types = 10;
-}
-
-// Represents the contents of the original request that was passed to
-// the `[Streaming]DetectIntent` call.
-message OriginalDetectIntentRequest {
-  // The source of this request, e.g., `google`, `facebook`, `slack`. It is set
-  // by Dialogflow-owned servers.
-  string source = 1;
-
-  // Optional. The version of the protocol used for this request.
-  // This field is AoG-specific.
-  string version = 2;
-
-  // Optional. This field is set to the value of the `QueryParameters.payload`
-  // field passed in the request. Some integrations that query a Dialogflow
-  // agent may provide additional information in the payload.
-  //
-  // In particular, for the Dialogflow Phone Gateway integration, this field has
-  // the form:
-  // <pre>{
-  //  "telephony": {
-  //    "caller_id": "+18558363987"
-  //  }
-  // }</pre>
-  // Note: The caller ID field (`caller_id`) will be redacted for Trial
-  // Edition agents and populated with the caller ID in [E.164
-  // format](https://en.wikipedia.org/wiki/E.164) for Essentials Edition agents.
-  google.protobuf.Struct payload = 3;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/agent.proto b/google/cloud/dialogflow_v2beta1/proto/agent.proto
deleted file mode 100644
index 51c5b831d..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/agent.proto
+++ /dev/null
@@ -1,518 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/environment.proto";
-import "google/cloud/dialogflow/v2beta1/validation_result.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "AgentProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [Agents][google.cloud.dialogflow.v2beta1.Agent].
-service Agents {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Retrieves the specified agent.
-  rpc GetAgent(GetAgentRequest) returns (Agent) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/agent"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/agent"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Creates/updates the specified agent.
-  rpc SetAgent(SetAgentRequest) returns (Agent) {
-    option (google.api.http) = {
-      post: "/v2beta1/{agent.parent=projects/*}/agent"
-      body: "agent"
-      additional_bindings {
-        post: "/v2beta1/{agent.parent=projects/*/locations/*}/agent"
-        body: "agent"
-      }
-    };
-    option (google.api.method_signature) = "agent";
-  }
-
-  // Deletes the specified agent.
-  rpc DeleteAgent(DeleteAgentRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{parent=projects/*}/agent"
-      additional_bindings {
-        delete: "/v2beta1/{parent=projects/*/locations/*}/agent"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Returns the list of agents.
-  // Since there is at most one conversational agent per project, this method is
-  // useful primarily for listing all agents across projects the caller has
-  // access to. One can achieve that with a wildcard project collection id "-".
-  // Refer to [List
-  // Sub-Collections](https://cloud.google.com/apis/design/design_patterns#list_sub-collections).
-  rpc SearchAgents(SearchAgentsRequest) returns (SearchAgentsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/agent:search"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/agent:search"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Trains the specified agent.
-  //
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc TrainAgent(TrainAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/agent:train"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/agent:train"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Exports the specified agent to a ZIP file.
-  //
-  //
-  // Operation <response: [ExportAgentResponse][google.cloud.dialogflow.v2beta1.ExportAgentResponse]>
-  rpc ExportAgent(ExportAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/agent:export"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/agent:export"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.cloud.dialogflow.v2beta1.ExportAgentResponse"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Imports the specified agent from a ZIP file.
-  //
-  // Uploads new intents and entity types without deleting the existing ones.
-  // Intents and entity types with the same name are replaced with the new
-  // versions from [ImportAgentRequest][google.cloud.dialogflow.v2beta1.ImportAgentRequest]. After the import, the imported draft
-  // agent will be trained automatically (unless disabled in agent settings).
-  // However, once the import is done, training may not be completed yet. Please
-  // call [TrainAgent][google.cloud.dialogflow.v2beta1.Agents.TrainAgent] and wait for the operation it returns in order to train
-  // explicitly.
-  //
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  // An operation which tracks when importing is complete. It only tracks
-  // when the draft agent is updated not when it is done training.
-  rpc ImportAgent(ImportAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/agent:import"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/agent:import"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Restores the specified agent from a ZIP file.
-  //
-  // Replaces the current agent version with a new one. All the intents and
-  // entity types in the older version are deleted. After the restore, the
-  // restored draft agent will be trained automatically (unless disabled in
-  // agent settings). However, once the restore is done, training may not be
-  // completed yet. Please call [TrainAgent][google.cloud.dialogflow.v2beta1.Agents.TrainAgent] and wait for the operation it
-  // returns in order to train explicitly.
-  //
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  // An operation which tracks when restoring is complete. It only tracks
-  // when the draft agent is updated not when it is done training.
-  rpc RestoreAgent(RestoreAgentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/agent:restore"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/agent:restore"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Gets agent validation result. Agent validation is performed during
-  // training time and is updated automatically when training is completed.
-  rpc GetValidationResult(GetValidationResultRequest) returns (ValidationResult) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/agent/validationResult"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/agent/validationResult"
-      }
-    };
-  }
-}
-
-// A Dialogflow agent is a virtual agent that handles conversations with your
-// end-users. It is a natural language understanding module that understands the
-// nuances of human language. Dialogflow translates end-user text or audio
-// during a conversation to structured data that your apps and services can
-// understand. You design and build a Dialogflow agent to handle the types of
-// conversations required for your system.
-//
-// For more information about agents, see the
-// [Agent guide](https://cloud.google.com/dialogflow/docs/agents-overview).
-message Agent {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Agent"
-    pattern: "projects/{project}/agent"
-    pattern: "projects/{project}/locations/{location}/agent"
-  };
-
-  // Match mode determines how intents are detected from user queries.
-  enum MatchMode {
-    // Not specified.
-    MATCH_MODE_UNSPECIFIED = 0;
-
-    // Best for agents with a small number of examples in intents and/or wide
-    // use of templates syntax and composite entities.
-    MATCH_MODE_HYBRID = 1;
-
-    // Can be used for agents with a large number of examples in intents,
-    // especially the ones using @sys.any or very large custom entities.
-    MATCH_MODE_ML_ONLY = 2;
-  }
-
-  // API version for the agent.
-  enum ApiVersion {
-    // Not specified.
-    API_VERSION_UNSPECIFIED = 0;
-
-    // Legacy V1 API.
-    API_VERSION_V1 = 1;
-
-    // V2 API.
-    API_VERSION_V2 = 2;
-
-    // V2beta1 API.
-    API_VERSION_V2_BETA_1 = 3;
-  }
-
-  // Represents the agent tier.
-  enum Tier {
-    // Not specified. This value should never be used.
-    TIER_UNSPECIFIED = 0;
-
-    // Standard tier.
-    TIER_STANDARD = 1;
-
-    // Enterprise tier (Essentials).
-    TIER_ENTERPRISE = 2;
-
-    // Enterprise tier (Plus).
-    TIER_ENTERPRISE_PLUS = 3;
-  }
-
-  // Required. The project of this agent.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "cloudresourcemanager.googleapis.com/Project"
-    }
-  ];
-
-  // Required. The name of this agent.
-  string display_name = 2;
-
-  // Required. The default language of the agent as a language tag. See
-  // [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. This field cannot be
-  // set by the `Update` method.
-  string default_language_code = 3;
-
-  // Optional. The list of all languages supported by this agent (except for the
-  // `default_language_code`).
-  repeated string supported_language_codes = 4;
-
-  // Required. The time zone of this agent from the
-  // [time zone database](https://www.iana.org/time-zones), e.g.,
-  // America/New_York, Europe/Paris.
-  string time_zone = 5;
-
-  // Optional. The description of this agent.
-  // The maximum length is 500 characters. If exceeded, the request is rejected.
-  string description = 6;
-
-  // Optional. The URI of the agent's avatar.
-  // Avatars are used throughout the Dialogflow console and in the self-hosted
-  // [Web
-  // Demo](https://cloud.google.com/dialogflow/docs/integrations/web-demo)
-  // integration.
-  string avatar_uri = 7;
-
-  // Optional. Determines whether this agent should log conversation queries.
-  bool enable_logging = 8;
-
-  // Optional. Determines how intents are detected from user queries.
-  MatchMode match_mode = 9 [deprecated = true];
-
-  // Optional. To filter out false positive results and still get variety in
-  // matched natural language inputs for your agent, you can tune the machine
-  // learning classification threshold. If the returned score value is less than
-  // the threshold value, then a fallback intent will be triggered or, if there
-  // are no fallback intents defined, no intent will be triggered. The score
-  // values range from 0.0 (completely uncertain) to 1.0 (completely certain).
-  // If set to 0.0, the default of 0.3 is used.
-  float classification_threshold = 10;
-
-  // Optional. API version displayed in Dialogflow console. If not specified,
-  // V2 API is assumed. Clients are free to query different service endpoints
-  // for different API versions. However, bots connectors and webhook calls will
-  // follow the specified API version.
-  ApiVersion api_version = 14;
-
-  // Optional. The agent tier. If not specified, TIER_STANDARD is assumed.
-  Tier tier = 15;
-}
-
-// The request message for [Agents.GetAgent][google.cloud.dialogflow.v2beta1.Agents.GetAgent].
-message GetAgentRequest {
-  // Required. The project that the agent to fetch is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// The request message for [Agents.SetAgent][google.cloud.dialogflow.v2beta1.Agents.SetAgent].
-message SetAgentRequest {
-  // Required. The agent to update.
-  Agent agent = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2;
-}
-
-// The request message for [Agents.DeleteAgent][google.cloud.dialogflow.v2beta1.Agents.DeleteAgent].
-message DeleteAgentRequest {
-  // Required. The project that the agent to delete is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// Contains basic configuration for a sub-agent.
-message SubAgent {
-  // Required. The project of this agent.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string project = 1;
-
-  // Optional. The unique identifier (`environment name` in dialogflow console)
-  // of this sub-agent environment. Assumes draft environment if `environment`
-  // is not set.
-  string environment = 2;
-}
-
-// The request message for [Agents.SearchAgents][google.cloud.dialogflow.v2beta1.Agents.SearchAgents].
-message SearchAgentsRequest {
-  // Required. The project to list agents from.
-  // Format: `projects/<Project ID or '-'>` or
-  //         `projects/<Project ID or '-'>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for [Agents.SearchAgents][google.cloud.dialogflow.v2beta1.Agents.SearchAgents].
-message SearchAgentsResponse {
-  // The list of agents. There will be a maximum number of items returned based
-  // on the page_size field in the request.
-  repeated Agent agents = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Agents.TrainAgent][google.cloud.dialogflow.v2beta1.Agents.TrainAgent].
-message TrainAgentRequest {
-  // Required. The project that the agent to train is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// The request message for [Agents.ExportAgent][google.cloud.dialogflow.v2beta1.Agents.ExportAgent].
-message ExportAgentRequest {
-  // Required. The project that the agent to export is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Optional. The
-  // [Google Cloud Storage](https://cloud.google.com/storage/docs/)
-  // URI to export the agent to.
-  // The format of this URI must be `gs://<bucket-name>/<object-name>`.
-  // If left unspecified, the serialized agent is returned inline.
-  string agent_uri = 2;
-}
-
-// The response message for [Agents.ExportAgent][google.cloud.dialogflow.v2beta1.Agents.ExportAgent].
-message ExportAgentResponse {
-  // The exported agent.
-  oneof agent {
-    // The URI to a file containing the exported agent. This field is populated
-    // only if `agent_uri` is specified in `ExportAgentRequest`.
-    string agent_uri = 1;
-
-    // Zip compressed raw byte content for agent.
-    bytes agent_content = 2;
-  }
-}
-
-// The request message for [Agents.ImportAgent][google.cloud.dialogflow.v2beta1.Agents.ImportAgent].
-message ImportAgentRequest {
-  // Required. The project that the agent to import is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Required. The agent to import.
-  oneof agent {
-    // The URI to a Google Cloud Storage file containing the agent to import.
-    // Note: The URI must start with "gs://".
-    string agent_uri = 2;
-
-    // Zip compressed raw byte content for agent.
-    bytes agent_content = 3;
-  }
-}
-
-// The request message for [Agents.RestoreAgent][google.cloud.dialogflow.v2beta1.Agents.RestoreAgent].
-message RestoreAgentRequest {
-  // Required. The project that the agent to restore is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Required. The agent to restore.
-  oneof agent {
-    // The URI to a Google Cloud Storage file containing the agent to restore.
-    // Note: The URI must start with "gs://".
-    string agent_uri = 2;
-
-    // Zip compressed raw byte content for agent.
-    bytes agent_content = 3;
-  }
-}
-
-// The request message for [Agents.GetValidationResult][google.cloud.dialogflow.v2beta1.Agents.GetValidationResult].
-message GetValidationResultRequest {
-  // Required. The project that the agent is associated with.
-  // Format: `projects/<Project ID>` or
-  //         `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-
-  // Optional. The language for which you want a validation result. If not
-  // specified, the agent's default language is used. [Many
-  // languages](https://cloud.google.com/dialogflow/docs/reference/language)
-  // are supported. Note: languages must be enabled in the agent before they can
-  // be used.
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/answer_record.proto b/google/cloud/dialogflow_v2beta1/proto/answer_record.proto
deleted file mode 100644
index 4f7b9f44a..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/answer_record.proto
+++ /dev/null
@@ -1,330 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/participant.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "AnswerRecordsProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing
-// [AnswerRecords][google.cloud.dialogflow.v2beta1.AnswerRecord].
-service AnswerRecords {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Deprecated.
-  // Retrieves a specific answer record.
-  rpc GetAnswerRecord(GetAnswerRecordRequest) returns (AnswerRecord) {
-    option deprecated = true;
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/answerRecords/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/answerRecords/*}"
-      }
-    };
-  }
-
-  // Returns the list of all answer records in the specified project in reverse
-  // chronological order.
-  rpc ListAnswerRecords(ListAnswerRecordsRequest)
-      returns (ListAnswerRecordsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/answerRecords"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/answerRecords"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Updates the specified answer record.
-  rpc UpdateAnswerRecord(UpdateAnswerRecordRequest) returns (AnswerRecord) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{answer_record.name=projects/*/answerRecords/*}"
-      body: "answer_record"
-      additional_bindings {
-        patch: "/v2beta1/{answer_record.name=projects/*/locations/*/answerRecords/*}"
-        body: "answer_record"
-      }
-    };
-    option (google.api.method_signature) = "answer_record,update_mask";
-  }
-}
-
-// Answer records are records to manage answer history and feedbacks for
-// Dialogflow.
-//
-// Currently, answer record includes:
-//
-// - human agent assistant article suggestion
-// - human agent assistant faq article
-//
-// It doesn't include:
-//
-// - `DetectIntent` intent matching
-// - `DetectIntent` knowledge
-//
-// Answer records are not related to the conversation history in the
-// Dialogflow Console. A Record is generated even when the end-user disables
-// conversation history in the console. Records are created when there's a human
-// agent assistant suggestion generated.
-//
-// A typical workflow for customers provide feedback to an answer is:
-//
-// 1. For human agent assistant, customers get suggestion via ListSuggestions
-//    API. Together with the answers,
-//    [AnswerRecord.name][google.cloud.dialogflow.v2beta1.AnswerRecord.name] are
-//    returned to the customers.
-// 2. The customer uses the
-// [AnswerRecord.name][google.cloud.dialogflow.v2beta1.AnswerRecord.name] to
-// call the
-//    [UpdateAnswerRecord][] method to send feedback about a specific answer
-//    that they believe is wrong.
-message AnswerRecord {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/AnswerRecord"
-    pattern: "projects/{project}/answerRecords/{answer_record}"
-    pattern: "projects/{project}/locations/{location}/answerRecords/{answer_record}"
-  };
-
-  // The unique identifier of this answer record.
-  // Required for
-  // [AnswerRecords.UpdateAnswerRecord][google.cloud.dialogflow.v2beta1.AnswerRecords.UpdateAnswerRecord]
-  // method. Format: `projects/<Project ID>/locations/<Location
-  // ID>/answerRecords/<Answer Record ID>`.
-  string name = 1;
-
-  // Optional. The AnswerFeedback for this record. You can set this with
-  // [AnswerRecords.UpdateAnswerRecord][google.cloud.dialogflow.v2beta1.AnswerRecords.UpdateAnswerRecord]
-  // in order to give us feedback about this answer.
-  AnswerFeedback answer_feedback = 3;
-
-  // Output only. The record for this answer.
-  oneof record {
-    // Output only. The record for human agent assistant.
-    AgentAssistantRecord agent_assistant_record = 4;
-  }
-}
-
-// Represents a record of a human agent assistant answer.
-message AgentAssistantRecord {
-  // Output only. The agent assistant answer.
-  oneof answer {
-    // Output only. The article suggestion answer.
-    ArticleAnswer article_suggestion_answer = 5
-        [(google.api.field_behavior) = OUTPUT_ONLY];
-
-    // Output only. The FAQ answer.
-    FaqAnswer faq_answer = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
-  }
-}
-
-// Represents feedback the customer has about the quality & correctness of a
-// certain answer in a conversation.
-message AnswerFeedback {
-  // The correctness level of an answer.
-  enum CorrectnessLevel {
-    // Correctness level unspecified.
-    CORRECTNESS_LEVEL_UNSPECIFIED = 0;
-
-    // Answer is totally wrong.
-    NOT_CORRECT = 1;
-
-    // Answer is partially correct.
-    PARTIALLY_CORRECT = 2;
-
-    // Answer is fully correct.
-    FULLY_CORRECT = 3;
-  }
-
-  // The correctness level of the specific answer.
-  CorrectnessLevel correctness_level = 1;
-
-  // Normally, detail feedback is provided when answer is not fully correct.
-  oneof detail_feedback {
-    // Optional. Detail feedback of agent assistant suggestions.
-    AgentAssistantFeedback agent_assistant_detail_feedback = 2;
-  }
-
-  // Indicates whether the answer/item was clicked by the human agent
-  // or not. Default to false.
-  bool clicked = 3;
-
-  // Time when the answer/item was clicked.
-  google.protobuf.Timestamp click_time = 5;
-
-  // Indicates whether the answer/item was displayed to the human
-  // agent in the agent desktop UI. Default to false.
-  bool displayed = 4;
-
-  // Time when the answer/item was displayed.
-  google.protobuf.Timestamp display_time = 6;
-}
-
-// Detail feedback of Agent Assistant result.
-message AgentAssistantFeedback {
-  // Feedback for conversation summarization.
-  message SummarizationFeedback {
-    // Timestamp when composing of the summary starts.
-    google.protobuf.Timestamp start_timestamp = 1;
-
-    // Timestamp when the summary was submitted.
-    google.protobuf.Timestamp submit_timestamp = 2;
-
-    // Text of actual submitted summary.
-    string summary_text = 3;
-  }
-
-  // Relevance of an answer.
-  enum AnswerRelevance {
-    // Answer relevance unspecified.
-    ANSWER_RELEVANCE_UNSPECIFIED = 0;
-
-    // Answer is irrelevant to query.
-    IRRELEVANT = 1;
-
-    // Answer is relevant to query.
-    RELEVANT = 2;
-  }
-
-  // Correctness of document.
-  enum DocumentCorrectness {
-    // Document correctness unspecified.
-    DOCUMENT_CORRECTNESS_UNSPECIFIED = 0;
-
-    // Information in document is incorrect.
-    INCORRECT = 1;
-
-    // Information in document is correct.
-    CORRECT = 2;
-  }
-
-  // Efficiency of document.
-  enum DocumentEfficiency {
-    // Document efficiency unspecified.
-    DOCUMENT_EFFICIENCY_UNSPECIFIED = 0;
-
-    // Document is inefficient.
-    INEFFICIENT = 1;
-
-    // Document is efficient.
-    EFFICIENT = 2;
-  }
-
-  // Optional. Whether or not the suggested answer is relevant.
-  //
-  // For example:
-  //
-  // * Query: "Can I change my mailing address?"
-  // * Suggested document says: "Items must be returned/exchanged within 60
-  //   days of the purchase date."
-  // * [answer_relevance][google.cloud.dialogflow.v2beta1.AgentAssistantFeedback.answer_relevance]: [AnswerRelevance.IRRELEVANT][google.cloud.dialogflow.v2beta1.AgentAssistantFeedback.AnswerRelevance.IRRELEVANT]
-  AnswerRelevance answer_relevance = 1;
-
-  // Optional. Whether or not the information in the document is correct.
-  //
-  // For example:
-  //
-  // * Query: "Can I return the package in 2 days once received?"
-  // * Suggested document says: "Items must be returned/exchanged within 60
-  //   days of the purchase date."
-  // * Ground truth: "No return or exchange is allowed."
-  // * [document_correctness]: INCORRECT
-  DocumentCorrectness document_correctness = 2;
-
-  // Optional. Whether or not the suggested document is efficient. For example,
-  // if the document is poorly written, hard to understand, hard to use or
-  // too long to find useful information,
-  // [document_efficiency][google.cloud.dialogflow.v2beta1.AgentAssistantFeedback.document_efficiency]
-  // is
-  // [DocumentEfficiency.INEFFICIENT][google.cloud.dialogflow.v2beta1.AgentAssistantFeedback.DocumentEfficiency.INEFFICIENT].
-  DocumentEfficiency document_efficiency = 3;
-
-  // Feedback for conversation summarization.
-  SummarizationFeedback summarization_feedback = 4;
-}
-
-// Request message for
-// [AnswerRecords.GetAnswerRecord][google.cloud.dialogflow.v2beta1.AnswerRecords.GetAnswerRecord].
-message GetAnswerRecordRequest {
-  // Required. The name of the answer record to retrieve.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/answerRecords/<Answer Record Id>`.
-  string name = 1;
-}
-
-// Request message for
-// [AnswerRecords.ListAnswerRecords][google.cloud.dialogflow.v2beta1.AnswerRecords.ListAnswerRecords].
-message ListAnswerRecordsRequest {
-  // Required. The project to list all answer records for in reverse
-  // chronological order. Format: `projects/<Project ID>/locations/<Location
-  // ID>`.
-  string parent = 1 [(google.api.resource_reference) = {
-    child_type: "dialogflow.googleapis.com/AnswerRecord"
-  }];
-
-  // Optional. The maximum number of records to return in a single page.
-  // The server may return fewer records than this. If unspecified, we use 10.
-  // The maximum is 100.
-  int32 page_size = 3;
-
-  // Optional. The
-  // [ListAnswerRecordsResponse.next_page_token][google.cloud.dialogflow.v2beta1.ListAnswerRecordsResponse.next_page_token]
-  // value returned from a previous list request used to continue listing on
-  // the next page.
-  string page_token = 4;
-}
-
-// Response message for
-// [AnswerRecords.ListAnswerRecords][google.cloud.dialogflow.v2beta1.AnswerRecords.ListAnswerRecords].
-message ListAnswerRecordsResponse {
-  // The list of answer records.
-  repeated AnswerRecord answer_records = 1;
-
-  // A token to retrieve next page of results. Or empty if there are no more
-  // results.
-  // Pass this value in the
-  // [ListAnswerRecordsRequest.page_token][google.cloud.dialogflow.v2beta1.ListAnswerRecordsRequest.page_token]
-  // field in the subsequent call to `ListAnswerRecords` method to retrieve the
-  // next page of results.
-  string next_page_token = 2;
-}
-
-// Request message for
-// [AnswerRecords.UpdateAnswerRecord][google.cloud.dialogflow.v2beta1.AnswerRecords.UpdateAnswerRecord].
-message UpdateAnswerRecordRequest {
-  // Required. Answer record to update.
-  AnswerRecord answer_record = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/audio_config.proto b/google/cloud/dialogflow_v2beta1/proto/audio_config.proto
deleted file mode 100644
index f8c42b7db..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/audio_config.proto
+++ /dev/null
@@ -1,437 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/field_mask.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "AudioConfigProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Hints for the speech recognizer to help with recognition in a specific
-// conversation state.
-message SpeechContext {
-  // Optional. A list of strings containing words and phrases that the speech
-  // recognizer should recognize with higher likelihood.
-  //
-  // This list can be used to:
-  //
-  // * improve accuracy for words and phrases you expect the user to say,
-  //   e.g. typical commands for your Dialogflow agent
-  // * add additional words to the speech recognizer vocabulary
-  // * ...
-  //
-  // See the [Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/quotas) for usage
-  // limits.
-  repeated string phrases = 1;
-
-  // Optional. Boost for this context compared to other contexts:
-  //
-  // * If the boost is positive, Dialogflow will increase the probability that
-  //   the phrases in this context are recognized over similar sounding phrases.
-  // * If the boost is unspecified or non-positive, Dialogflow will not apply
-  //   any boost.
-  //
-  // Dialogflow recommends that you use boosts in the range (0, 20] and that you
-  // find a value that fits your use case with binary search.
-  float boost = 2;
-}
-
-// Audio encoding of the audio content sent in the conversational query request.
-// Refer to the
-// [Cloud Speech API
-// documentation](https://cloud.google.com/speech-to-text/docs/basics) for more
-// details.
-enum AudioEncoding {
-  // Not specified.
-  AUDIO_ENCODING_UNSPECIFIED = 0;
-
-  // Uncompressed 16-bit signed little-endian samples (Linear PCM).
-  AUDIO_ENCODING_LINEAR_16 = 1;
-
-  // [`FLAC`](https://xiph.org/flac/documentation.html) (Free Lossless Audio
-  // Codec) is the recommended encoding because it is lossless (therefore
-  // recognition is not compromised) and requires only about half the
-  // bandwidth of `LINEAR16`. `FLAC` stream encoding supports 16-bit and
-  // 24-bit samples, however, not all fields in `STREAMINFO` are supported.
-  AUDIO_ENCODING_FLAC = 2;
-
-  // 8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.
-  AUDIO_ENCODING_MULAW = 3;
-
-  // Adaptive Multi-Rate Narrowband codec. `sample_rate_hertz` must be 8000.
-  AUDIO_ENCODING_AMR = 4;
-
-  // Adaptive Multi-Rate Wideband codec. `sample_rate_hertz` must be 16000.
-  AUDIO_ENCODING_AMR_WB = 5;
-
-  // Opus encoded audio frames in Ogg container
-  // ([OggOpus](https://wiki.xiph.org/OggOpus)).
-  // `sample_rate_hertz` must be 16000.
-  AUDIO_ENCODING_OGG_OPUS = 6;
-
-  // Although the use of lossy encodings is not recommended, if a very low
-  // bitrate encoding is required, `OGG_OPUS` is highly preferred over
-  // Speex encoding. The [Speex](https://speex.org/) encoding supported by
-  // Dialogflow API has a header byte in each block, as in MIME type
-  // `audio/x-speex-with-header-byte`.
-  // It is a variant of the RTP Speex encoding defined in
-  // [RFC 5574](https://tools.ietf.org/html/rfc5574).
-  // The stream is a sequence of blocks, one block per RTP packet. Each block
-  // starts with a byte containing the length of the block, in bytes, followed
-  // by one or more frames of Speex data, padded to an integral number of
-  // bytes (octets) as specified in RFC 5574. In other words, each RTP header
-  // is replaced with a single byte containing the block length. Only Speex
-  // wideband is supported. `sample_rate_hertz` must be 16000.
-  AUDIO_ENCODING_SPEEX_WITH_HEADER_BYTE = 7;
-}
-
-// Information for a word recognized by the speech recognizer.
-message SpeechWordInfo {
-  // The word this info is for.
-  string word = 3;
-
-  // Time offset relative to the beginning of the audio that corresponds to the
-  // start of the spoken word. This is an experimental feature and the accuracy
-  // of the time offset can vary.
-  google.protobuf.Duration start_offset = 1;
-
-  // Time offset relative to the beginning of the audio that corresponds to the
-  // end of the spoken word. This is an experimental feature and the accuracy of
-  // the time offset can vary.
-  google.protobuf.Duration end_offset = 2;
-
-  // The Speech confidence between 0.0 and 1.0 for this word. A higher number
-  // indicates an estimated greater likelihood that the recognized word is
-  // correct. The default of 0.0 is a sentinel value indicating that confidence
-  // was not set.
-  //
-  // This field is not guaranteed to be fully stable over time for the same
-  // audio input. Users should also not rely on it to always be provided.
-  float confidence = 4;
-}
-
-// Variant of the specified [Speech model][google.cloud.dialogflow.v2beta1.InputAudioConfig.model] to use.
-//
-// See the [Cloud Speech
-// documentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)
-// for which models have different variants. For example, the "phone_call" model
-// has both a standard and an enhanced variant. When you use an enhanced model,
-// you will generally receive higher quality results than for a standard model.
-enum SpeechModelVariant {
-  // No model variant specified. In this case Dialogflow defaults to
-  // USE_BEST_AVAILABLE.
-  SPEECH_MODEL_VARIANT_UNSPECIFIED = 0;
-
-  // Use the best available variant of the [Speech
-  // model][InputAudioConfig.model] that the caller is eligible for.
-  //
-  // Please see the [Dialogflow
-  // docs](https://cloud.google.com/dialogflow/docs/data-logging) for
-  // how to make your project eligible for enhanced models.
-  USE_BEST_AVAILABLE = 1;
-
-  // Use standard model variant even if an enhanced model is available.  See the
-  // [Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)
-  // for details about enhanced models.
-  USE_STANDARD = 2;
-
-  // Use an enhanced model variant:
-  //
-  // * If an enhanced variant does not exist for the given
-  //   [model][google.cloud.dialogflow.v2beta1.InputAudioConfig.model] and request language, Dialogflow falls
-  //   back to the standard variant.
-  //
-  //   The [Cloud Speech
-  //   documentation](https://cloud.google.com/speech-to-text/docs/enhanced-models)
-  //   describes which models have enhanced variants.
-  //
-  // * If the API caller isn't eligible for enhanced models, Dialogflow returns
-  //   an error.  Please see the [Dialogflow
-  //   docs](https://cloud.google.com/dialogflow/docs/data-logging)
-  //   for how to make your project eligible.
-  USE_ENHANCED = 3;
-}
-
-// Instructs the speech recognizer on how to process the audio content.
-message InputAudioConfig {
-  // Required. Audio encoding of the audio content to process.
-  AudioEncoding audio_encoding = 1;
-
-  // Required. Sample rate (in Hertz) of the audio content sent in the query.
-  // Refer to
-  // [Cloud Speech API
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics) for
-  // more details.
-  int32 sample_rate_hertz = 2;
-
-  // Required. The language of the supplied audio. Dialogflow does not do
-  // translations. See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. Note that queries in
-  // the same session do not necessarily need to specify the same language.
-  string language_code = 3;
-
-  // If `true`, Dialogflow returns [SpeechWordInfo][google.cloud.dialogflow.v2beta1.SpeechWordInfo] in
-  // [StreamingRecognitionResult][google.cloud.dialogflow.v2beta1.StreamingRecognitionResult] with information about the recognized speech
-  // words, e.g. start and end time offsets. If false or unspecified, Speech
-  // doesn't return any word-level information.
-  bool enable_word_info = 13;
-
-  // A list of strings containing words and phrases that the speech
-  // recognizer should recognize with higher likelihood.
-  //
-  // See [the Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics#phrase-hints)
-  // for more details.
-  //
-  // This field is deprecated. Please use [speech_contexts]() instead. If you
-  // specify both [phrase_hints]() and [speech_contexts](), Dialogflow will
-  // treat the [phrase_hints]() as a single additional [SpeechContext]().
-  repeated string phrase_hints = 4 [deprecated = true];
-
-  // Context information to assist speech recognition.
-  //
-  // See [the Cloud Speech
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics#phrase-hints)
-  // for more details.
-  repeated SpeechContext speech_contexts = 11;
-
-  // Which Speech model to select for the given request. Select the
-  // model best suited to your domain to get best results. If a model is not
-  // explicitly specified, then we auto-select a model based on the parameters
-  // in the InputAudioConfig.
-  // If enhanced speech model is enabled for the agent and an enhanced
-  // version of the specified model for the language does not exist, then the
-  // speech is recognized using the standard version of the specified model.
-  // Refer to
-  // [Cloud Speech API
-  // documentation](https://cloud.google.com/speech-to-text/docs/basics#select-model)
-  // for more details.
-  string model = 7;
-
-  // Which variant of the [Speech model][google.cloud.dialogflow.v2beta1.InputAudioConfig.model] to use.
-  SpeechModelVariant model_variant = 10;
-
-  // If `false` (default), recognition does not cease until the
-  // client closes the stream.
-  // If `true`, the recognizer will detect a single spoken utterance in input
-  // audio. Recognition ceases when it detects the audio's voice has
-  // stopped or paused. In this case, once a detected intent is received, the
-  // client should close the stream and start a new request with a new stream as
-  // needed.
-  // Note: This setting is relevant only for streaming methods.
-  // Note: When specified, InputAudioConfig.single_utterance takes precedence
-  // over StreamingDetectIntentRequest.single_utterance.
-  bool single_utterance = 8;
-
-  // Only used in [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent] and
-  // [Participants.StreamingAnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.StreamingAnalyzeContent].
-  // If `false` and recognition doesn't return any result, trigger
-  // `NO_SPEECH_RECOGNIZED` event to Dialogflow agent.
-  bool disable_no_speech_recognized_event = 14;
-}
-
-// Description of which voice to use for speech synthesis.
-message VoiceSelectionParams {
-  // Optional. The name of the voice. If not set, the service will choose a
-  // voice based on the other parameters such as language_code and
-  // [ssml_gender][google.cloud.dialogflow.v2beta1.VoiceSelectionParams.ssml_gender].
-  //
-  // For the list of available voices, please refer to [Supported voices and
-  // languages](https://cloud.google.com/text-to-speech/docs/voices).
-  string name = 1;
-
-  // Optional. The preferred gender of the voice. If not set, the service will
-  // choose a voice based on the other parameters such as language_code and
-  // [name][google.cloud.dialogflow.v2beta1.VoiceSelectionParams.name]. Note that this is only a preference, not requirement. If a
-  // voice of the appropriate gender is not available, the synthesizer should
-  // substitute a voice with a different gender rather than failing the request.
-  SsmlVoiceGender ssml_gender = 2;
-}
-
-// Configuration of how speech should be synthesized.
-message SynthesizeSpeechConfig {
-  // Optional. Speaking rate/speed, in the range [0.25, 4.0]. 1.0 is the normal
-  // native speed supported by the specific voice. 2.0 is twice as fast, and
-  // 0.5 is half as fast. If unset(0.0), defaults to the native 1.0 speed. Any
-  // other values < 0.25 or > 4.0 will return an error.
-  double speaking_rate = 1;
-
-  // Optional. Speaking pitch, in the range [-20.0, 20.0]. 20 means increase 20
-  // semitones from the original pitch. -20 means decrease 20 semitones from the
-  // original pitch.
-  double pitch = 2;
-
-  // Optional. Volume gain (in dB) of the normal native volume supported by the
-  // specific voice, in the range [-96.0, 16.0]. If unset, or set to a value of
-  // 0.0 (dB), will play at normal native signal amplitude. A value of -6.0 (dB)
-  // will play at approximately half the amplitude of the normal native signal
-  // amplitude. A value of +6.0 (dB) will play at approximately twice the
-  // amplitude of the normal native signal amplitude. We strongly recommend not
-  // to exceed +10 (dB) as there's usually no effective increase in loudness for
-  // any value greater than that.
-  double volume_gain_db = 3;
-
-  // Optional. An identifier which selects 'audio effects' profiles that are
-  // applied on (post synthesized) text to speech. Effects are applied on top of
-  // each other in the order they are given.
-  repeated string effects_profile_id = 5;
-
-  // Optional. The desired voice of the synthesized audio.
-  VoiceSelectionParams voice = 4;
-}
-
-// Gender of the voice as described in
-// [SSML voice element](https://www.w3.org/TR/speech-synthesis11/#edef_voice).
-enum SsmlVoiceGender {
-  // An unspecified gender, which means that the client doesn't care which
-  // gender the selected voice will have.
-  SSML_VOICE_GENDER_UNSPECIFIED = 0;
-
-  // A male voice.
-  SSML_VOICE_GENDER_MALE = 1;
-
-  // A female voice.
-  SSML_VOICE_GENDER_FEMALE = 2;
-
-  // A gender-neutral voice.
-  SSML_VOICE_GENDER_NEUTRAL = 3;
-}
-
-// Instructs the speech synthesizer how to generate the output audio content.
-// If this audio config is supplied in a request, it overrides all existing
-// text-to-speech settings applied to the agent.
-message OutputAudioConfig {
-  // Required. Audio encoding of the synthesized audio content.
-  OutputAudioEncoding audio_encoding = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // The synthesis sample rate (in hertz) for this audio. If not
-  // provided, then the synthesizer will use the default sample rate based on
-  // the audio encoding. If this is different from the voice's natural sample
-  // rate, then the synthesizer will honor this request by converting to the
-  // desired sample rate (which might result in worse audio quality).
-  int32 sample_rate_hertz = 2;
-
-  // Configuration of how speech should be synthesized.
-  SynthesizeSpeechConfig synthesize_speech_config = 3;
-}
-
-// A wrapper of repeated TelephonyDtmf digits.
-message TelephonyDtmfEvents {
-  // A sequence of TelephonyDtmf digits.
-  repeated TelephonyDtmf dtmf_events = 1;
-}
-
-// Audio encoding of the output audio format in Text-To-Speech.
-enum OutputAudioEncoding {
-  // Not specified.
-  OUTPUT_AUDIO_ENCODING_UNSPECIFIED = 0;
-
-  // Uncompressed 16-bit signed little-endian samples (Linear PCM).
-  // Audio content returned as LINEAR16 also contains a WAV header.
-  OUTPUT_AUDIO_ENCODING_LINEAR_16 = 1;
-
-  // MP3 audio at 32kbps.
-  OUTPUT_AUDIO_ENCODING_MP3 = 2;
-
-  // MP3 audio at 64kbps.
-  OUTPUT_AUDIO_ENCODING_MP3_64_KBPS = 4;
-
-  // Opus encoded audio wrapped in an ogg container. The result will be a
-  // file which can be played natively on Android, and in browsers (at least
-  // Chrome and Firefox). The quality of the encoding is considerably higher
-  // than MP3 while using approximately the same bitrate.
-  OUTPUT_AUDIO_ENCODING_OGG_OPUS = 3;
-
-  // 8-bit samples that compand 14-bit audio samples using G.711 PCMU/mu-law.
-  OUTPUT_AUDIO_ENCODING_MULAW = 5;
-}
-
-// Configures speech transcription for  [ConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfile].
-message SpeechToTextConfig {
-  // Optional. The speech model used in speech to text.
-  // `SPEECH_MODEL_VARIANT_UNSPECIFIED`, `USE_BEST_AVAILABLE` will be treated as
-  // `USE_ENHANCED`. It can be overridden in [AnalyzeContentRequest][google.cloud.dialogflow.v2beta1.AnalyzeContentRequest] and
-  // [StreamingAnalyzeContentRequest][google.cloud.dialogflow.v2beta1.StreamingAnalyzeContentRequest] request.
-  SpeechModelVariant speech_model_variant = 1 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// [DTMF](https://en.wikipedia.org/wiki/Dual-tone_multi-frequency_signaling)
-// digit in Telephony Gateway.
-enum TelephonyDtmf {
-  // Not specified. This value may be used to indicate an absent digit.
-  TELEPHONY_DTMF_UNSPECIFIED = 0;
-
-  // Number: '1'.
-  DTMF_ONE = 1;
-
-  // Number: '2'.
-  DTMF_TWO = 2;
-
-  // Number: '3'.
-  DTMF_THREE = 3;
-
-  // Number: '4'.
-  DTMF_FOUR = 4;
-
-  // Number: '5'.
-  DTMF_FIVE = 5;
-
-  // Number: '6'.
-  DTMF_SIX = 6;
-
-  // Number: '7'.
-  DTMF_SEVEN = 7;
-
-  // Number: '8'.
-  DTMF_EIGHT = 8;
-
-  // Number: '9'.
-  DTMF_NINE = 9;
-
-  // Number: '0'.
-  DTMF_ZERO = 10;
-
-  // Letter: 'A'.
-  DTMF_A = 11;
-
-  // Letter: 'B'.
-  DTMF_B = 12;
-
-  // Letter: 'C'.
-  DTMF_C = 13;
-
-  // Letter: 'D'.
-  DTMF_D = 14;
-
-  // Asterisk/star: '*'.
-  DTMF_STAR = 15;
-
-  // Pound/diamond/hash/square/gate/octothorpe: '#'.
-  DTMF_POUND = 16;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/context.proto b/google/cloud/dialogflow_v2beta1/proto/context.proto
deleted file mode 100644
index a48e0ab63..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/context.proto
+++ /dev/null
@@ -1,374 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ContextProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [Contexts][google.cloud.dialogflow.v2beta1.Context].
-service Contexts {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all contexts in the specified session.
-  rpc ListContexts(ListContextsRequest) returns (ListContextsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/agent/sessions/*}/contexts"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent/sessions/*}/contexts"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified context.
-  rpc GetContext(GetContextRequest) returns (Context) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/agent/sessions/*/contexts/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/agent/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a context.
-  //
-  // If the specified context already exists, overrides the context.
-  rpc CreateContext(CreateContextRequest) returns (Context) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent/sessions/*}/contexts"
-      body: "context"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/agent/environments/*/users/*/sessions/*}/contexts"
-        body: "context"
-      }
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/sessions/*}/contexts"
-        body: "context"
-      }
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/contexts"
-        body: "context"
-      }
-    };
-    option (google.api.method_signature) = "parent,context";
-  }
-
-  // Updates the specified context.
-  rpc UpdateContext(UpdateContextRequest) returns (Context) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{context.name=projects/*/agent/sessions/*/contexts/*}"
-      body: "context"
-      additional_bindings {
-        patch: "/v2beta1/{context.name=projects/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-        body: "context"
-      }
-      additional_bindings {
-        patch: "/v2beta1/{context.name=projects/*/locations/*/agent/sessions/*/contexts/*}"
-        body: "context"
-      }
-      additional_bindings {
-        patch: "/v2beta1/{context.name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-        body: "context"
-      }
-    };
-    option (google.api.method_signature) = "context,update_mask";
-    option (google.api.method_signature) = "context";
-  }
-
-  // Deletes the specified context.
-  rpc DeleteContext(DeleteContextRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/agent/sessions/*/contexts/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/agent/sessions/*/contexts/*}"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/contexts/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Deletes all active contexts in the specified session.
-  rpc DeleteAllContexts(DeleteAllContextsRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{parent=projects/*/agent/sessions/*}/contexts"
-      additional_bindings {
-        delete: "/v2beta1/{parent=projects/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{parent=projects/*/locations/*/agent/sessions/*}/contexts"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/contexts"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-}
-
-// Dialogflow contexts are similar to natural language context. If a person says
-// to you "they are orange", you need context in order to understand what "they"
-// is referring to. Similarly, for Dialogflow to handle an end-user expression
-// like that, it needs to be provided with context in order to correctly match
-// an intent.
-//
-// Using contexts, you can control the flow of a conversation. You can configure
-// contexts for an intent by setting input and output contexts, which are
-// identified by string names. When an intent is matched, any configured output
-// contexts for that intent become active. While any contexts are active,
-// Dialogflow is more likely to match intents that are configured with input
-// contexts that correspond to the currently active contexts.
-//
-// For more information about context, see the
-// [Contexts guide](https://cloud.google.com/dialogflow/docs/contexts-overview).
-message Context {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Context"
-    pattern: "projects/{project}/agent/sessions/{session}/contexts/{context}"
-    pattern: "projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}/contexts/{context}"
-    pattern: "projects/{project}/locations/{location}/agent/sessions/{session}/contexts/{context}"
-  };
-
-  // Required. The unique identifier of the context. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context
-  //   ID>`,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>/contexts/<Context ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>/contexts/<Context ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>/contexts/<Context ID>`,
-  //
-  // The `Context ID` is always converted to lowercase, may only contain
-  // characters in a-zA-Z0-9_-% and may be at most 250 bytes long.
-  //
-  // If `Environment ID` is not specified, we assume default 'draft'
-  // environment. If `User ID` is not specified, we assume default '-' user.
-  //
-  // The following context names are reserved for internal use by Dialogflow.
-  // You should not use these contexts or create contexts with these names:
-  //
-  // * `__system_counters__`
-  // * `*_id_dialog_context`
-  // * `*_dialog_params_size`
-  string name = 1;
-
-  // Optional. The number of conversational query requests after which the
-  // context expires. The default is `0`. If set to `0`, the context expires
-  // immediately. Contexts expire automatically after 20 minutes if there
-  // are no matching queries.
-  int32 lifespan_count = 2;
-
-  // Optional. The collection of parameters associated with this context.
-  //
-  // Depending on your protocol or client library language, this is a
-  // map, associative array, symbol table, dictionary, or JSON object
-  // composed of a collection of (MapKey, MapValue) pairs:
-  //
-  // -   MapKey type: string
-  // -   MapKey value: parameter name
-  // -   MapValue type:
-  //     -   If parameter's entity type is a composite entity: map
-  //     -   Else: depending on parameter value type, could be one of string,
-  //         number, boolean, null, list or map
-  // -   MapValue value:
-  //     -   If parameter's entity type is a composite entity:
-  //         map from composite entity property names to property values
-  //     -   Else: parameter value
-  google.protobuf.Struct parameters = 3;
-}
-
-// The request message for [Contexts.ListContexts][google.cloud.dialogflow.v2beta1.Contexts.ListContexts].
-message ListContextsRequest {
-  // Required. The session to list all contexts from. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for [Contexts.ListContexts][google.cloud.dialogflow.v2beta1.Contexts.ListContexts].
-message ListContextsResponse {
-  // The list of contexts. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Context contexts = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Contexts.GetContext][google.cloud.dialogflow.v2beta1.Contexts.GetContext].
-message GetContextRequest {
-  // Required. The name of the context. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context
-  //   ID>`,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>/contexts/<Context ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>/contexts/<Context ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>/contexts/<Context ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-}
-
-// The request message for [Contexts.CreateContext][google.cloud.dialogflow.v2beta1.Contexts.CreateContext].
-message CreateContextRequest {
-  // Required. The session to create a context for. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-
-  // Required. The context to create.
-  Context context = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Contexts.UpdateContext][google.cloud.dialogflow.v2beta1.Contexts.UpdateContext].
-message UpdateContextRequest {
-  // Required. The context to update.
-  Context context = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Contexts.DeleteContext][google.cloud.dialogflow.v2beta1.Contexts.DeleteContext].
-message DeleteContextRequest {
-  // Required. The name of the context to delete. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>/contexts/<Context
-  //   ID>`,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>/contexts/<Context ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>/contexts/<Context ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>/contexts/<Context ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-}
-
-// The request message for [Contexts.DeleteAllContexts][google.cloud.dialogflow.v2beta1.Contexts.DeleteAllContexts].
-message DeleteAllContextsRequest {
-  // Required. The name of the session to delete all contexts from. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified we assume default 'draft' environment. If
-  // `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Context"
-    }
-  ];
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/conversation.proto b/google/cloud/dialogflow_v2beta1/proto/conversation.proto
deleted file mode 100644
index 6e203540b..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/conversation.proto
+++ /dev/null
@@ -1,442 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/gcs.proto";
-import "google/cloud/dialogflow/v2beta1/participant.proto";
-import "google/cloud/dialogflow/v2beta1/session.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-import "google/rpc/status.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ConversationProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing
-// [Conversations][google.cloud.dialogflow.v2beta1.Conversation].
-service Conversations {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Creates a new conversation. Conversations are auto-completed after 24
-  // hours.
-  //
-  // Conversation Lifecycle:
-  // There are two stages during a conversation: Automated Agent Stage and
-  // Assist Stage.
-  //
-  // For Automated Agent Stage, there will be a dialogflow agent responding to
-  // user queries.
-  //
-  // For Assist Stage, there's no dialogflow agent responding to user queries.
-  // But we will provide suggestions which are generated from conversation.
-  //
-  // If
-  // [Conversation.conversation_profile][google.cloud.dialogflow.v2beta1.Conversation.conversation_profile]
-  // is configured for a dialogflow agent, conversation will start from
-  // `Automated Agent Stage`, otherwise, it will start from `Assist Stage`. And
-  // during `Automated Agent Stage`, once an
-  // [Intent][google.cloud.dialogflow.v2beta1.Intent] with
-  // [Intent.live_agent_handoff][google.cloud.dialogflow.v2beta1.Intent.live_agent_handoff]
-  // is triggered, conversation will transfer to Assist Stage.
-  rpc CreateConversation(CreateConversationRequest) returns (Conversation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/conversations"
-      body: "conversation"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/conversations"
-        body: "conversation"
-      }
-    };
-    option (google.api.method_signature) = "parent,conversation";
-  }
-
-  // Returns the list of all conversations in the specified project.
-  rpc ListConversations(ListConversationsRequest)
-      returns (ListConversationsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/conversations"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/conversations"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specific conversation.
-  rpc GetConversation(GetConversationRequest) returns (Conversation) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/conversations/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/conversations/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Completes the specified conversation. Finished conversations are purged
-  // from the database after 30 days.
-  rpc CompleteConversation(CompleteConversationRequest) returns (Conversation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{name=projects/*/conversations/*}:complete"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{name=projects/*/locations/*/conversations/*}:complete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Batch ingests messages to conversation. Customers can use this RPC to
-  // ingest historical messages to conversation.
-  rpc BatchCreateMessages(BatchCreateMessagesRequest)
-      returns (BatchCreateMessagesResponse) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/conversations/*}/messages:batchCreate"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/conversations/*}/messages:batchCreate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Lists messages that belong to a given conversation.
-  // `messages` are ordered by `create_time` in descending order. To fetch
-  // updates without duplication, send request with filter
-  // `create_time_epoch_microseconds >
-  // [first item's create_time of previous request]` and empty page_token.
-  rpc ListMessages(ListMessagesRequest) returns (ListMessagesResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/conversations/*}/messages"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/conversations/*}/messages"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-}
-
-// Represents a conversation.
-// A conversation is an interaction between an agent, including live agents
-// and Dialogflow agents, and a support customer. Conversations can
-// include phone calls and text-based chat sessions.
-message Conversation {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Conversation"
-    pattern: "projects/{project}/conversations/{conversation}"
-    pattern: "projects/{project}/locations/{location}/conversations/{conversation}"
-  };
-
-  // Enumeration of the completion status of the conversation.
-  enum LifecycleState {
-    // Unknown.
-    LIFECYCLE_STATE_UNSPECIFIED = 0;
-
-    // Conversation is currently open for media analysis.
-    IN_PROGRESS = 1;
-
-    // Conversation has been completed.
-    COMPLETED = 2;
-  }
-
-  // Enumeration of the different conversation stages a conversation can be in.
-  // Reference:
-  // https://cloud.google.com/dialogflow/priv/docs/contact-center/basics#stages
-  enum ConversationStage {
-    // Unknown. Should never be used after a conversation is successfully
-    // created.
-    CONVERSATION_STAGE_UNSPECIFIED = 0;
-
-    // The conversation should return virtual agent responses into the
-    // conversation.
-    VIRTUAL_AGENT_STAGE = 1;
-
-    // The conversation should not provide responses, just listen and provide
-    // suggestions.
-    HUMAN_ASSIST_STAGE = 2;
-  }
-
-  // Output only. The unique identifier of this conversation.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The current state of the Conversation.
-  LifecycleState lifecycle_state = 2
-      [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Required. The Conversation Profile to be used to configure this
-  // Conversation. This field cannot be updated.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string conversation_profile = 3 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-
-  // Output only. Required if the conversation is to be connected over
-  // telephony.
-  ConversationPhoneNumber phone_number = 4
-      [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // The stage of a conversation. It indicates whether the virtual agent or a
-  // human agent is handling the conversation.
-  //
-  // If the conversation is created with the conversation profile that has
-  // Dialogflow config set, defaults to
-  // [ConversationStage.VIRTUAL_AGENT_STAGE][google.cloud.dialogflow.v2beta1.Conversation.ConversationStage.VIRTUAL_AGENT_STAGE];
-  // Otherwise, defaults to
-  // [ConversationStage.HUMAN_ASSIST_STAGE][google.cloud.dialogflow.v2beta1.Conversation.ConversationStage.HUMAN_ASSIST_STAGE].
-  //
-  // If the conversation is created with the conversation profile that has
-  // Dialogflow config set but explicitly sets conversation_stage to
-  // [ConversationStage.HUMAN_ASSIST_STAGE][google.cloud.dialogflow.v2beta1.Conversation.ConversationStage.HUMAN_ASSIST_STAGE],
-  // it skips
-  // [ConversationStage.VIRTUAL_AGENT_STAGE][google.cloud.dialogflow.v2beta1.Conversation.ConversationStage.VIRTUAL_AGENT_STAGE]
-  // stage and directly goes to
-  // [ConversationStage.HUMAN_ASSIST_STAGE][google.cloud.dialogflow.v2beta1.Conversation.ConversationStage.HUMAN_ASSIST_STAGE].
-  ConversationStage conversation_stage = 7;
-
-  // Output only. The time the conversation was started.
-  google.protobuf.Timestamp start_time = 5
-      [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The time the conversation was finished.
-  google.protobuf.Timestamp end_time = 6
-      [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// Represents a phone number for telephony integration. It allows for connecting
-// a particular conversation over telephony.
-message ConversationPhoneNumber {
-  // Output only. The phone number to connect to this conversation.
-  string phone_number = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// The request message for
-// [Conversations.CreateConversation][google.cloud.dialogflow.v2beta1.Conversations.CreateConversation].
-message CreateConversationRequest {
-  // Required. Resource identifier of the project creating the conversation.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-
-  // Required. The conversation to create.
-  Conversation conversation = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Identifier of the conversation. Generally it's auto generated by
-  // Google. Only set it if you cannot wait for the response to return a
-  // auto-generated one to you.
-  //
-  // The conversation ID must be compliant with the regression fomula
-  // "[a-zA-Z][a-zA-Z0-9_-]*" with the characters length in range of [3,64].
-  // If the field is provided, the caller is resposible for
-  // 1. the uniqueness of the ID, otherwise the request will be rejected.
-  // 2. the consistency for whether to use custom ID or not under a project to
-  // better ensure uniqueness.
-  string conversation_id = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for
-// [Conversations.ListConversations][google.cloud.dialogflow.v2beta1.Conversations.ListConversations].
-message ListConversationsRequest {
-  // Required. The project from which to list all conversation.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3;
-
-  // A filter expression that filters conversations listed in the response. In
-  // general, the expression must specify the field name, a comparison operator,
-  // and the value to use for filtering:
-  // <ul>
-  //   <li>The value must be a string, a number, or a boolean.</li>
-  //   <li>The comparison operator must be either `=`,`!=`, `>`, or `<`.</li>
-  //   <li>To filter on multiple expressions, separate the
-  //       expressions with `AND` or `OR` (omitting both implies `AND`).</li>
-  //   <li>For clarity, expressions can be enclosed in parentheses.</li>
-  // </ul>
-  // Only `lifecycle_state` can be filtered on in this way. For example,
-  // the following expression only returns `COMPLETED` conversations:
-  //
-  // `lifecycle_state = "COMPLETED"`
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4;
-}
-
-// The response message for
-// [Conversations.ListConversations][google.cloud.dialogflow.v2beta1.Conversations.ListConversations].
-message ListConversationsResponse {
-  // The list of conversations. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Conversation conversations = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for
-// [Conversations.GetConversation][google.cloud.dialogflow.v2beta1.Conversations.GetConversation].
-message GetConversationRequest {
-  // Required. The name of the conversation. Format:
-  // `projects/<Project ID>/locations/<Location ID>/conversations/<Conversation
-  // ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-}
-
-// The request message for
-// [Conversations.CompleteConversation][google.cloud.dialogflow.v2beta1.Conversations.CompleteConversation].
-message CompleteConversationRequest {
-  // Required. Resource identifier of the conversation to close.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-}
-
-// The request message to create one Message. Currently it is only used in
-// BatchCreateMessagesRequest.
-message CreateMessageRequest {
-  // Required. Resource identifier of the conversation to create message.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-
-  // Required. The message to create.
-  // [Message.participant][google.cloud.dialogflow.v2beta1.Message.participant]
-  // is required.
-  Message message = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Conversations.BatchCreateMessagesRequest][].
-message BatchCreateMessagesRequest {
-  // Required. Resource identifier of the conversation to create message.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Conversation"
-    }
-  ];
-
-  // Required. A maximum of 1000 Messages can be created in a batch.
-  // [CreateMessageRequest.message.send_time][] is required. All created
-  // messages will have identical
-  // [Message.create_time][google.cloud.dialogflow.v2beta1.Message.create_time].
-  repeated CreateMessageRequest requests = 2
-      [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Conversations.BatchCreateMessagesResponse][].
-message BatchCreateMessagesResponse {
-  // Messages created.
-  repeated Message messages = 1;
-}
-
-// The request message for
-// [Conversations.ListMessages][google.cloud.dialogflow.v2beta1.Conversations.ListMessages].
-message ListMessagesRequest {
-  // Required. The name of the conversation to list messages for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Message"
-    }
-  ];
-
-  // Optional. Filter on message fields. Currently predicates on `create_time`
-  // and `create_time_epoch_microseconds` are supported. `create_time` only
-  // support milliseconds accuracy. E.g.,
-  // `create_time_epoch_microseconds > 1551790877964485` or
-  // `create_time > 2017-01-15T01:30:15.01Z`.
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4;
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for
-// [Conversations.ListMessages][google.cloud.dialogflow.v2beta1.Conversations.ListMessages].
-message ListMessagesResponse {
-  // Required. The list of messages. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  // `messages` is sorted by `create_time` in descending order.
-  repeated Message messages = 1;
-
-  // Optional. Token to retrieve the next page of results, or empty if there are
-  // no more results in the list.
-  string next_page_token = 2;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/conversation_event.proto b/google/cloud/dialogflow_v2beta1/proto/conversation_event.proto
deleted file mode 100644
index 35c1de1ee..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/conversation_event.proto
+++ /dev/null
@@ -1,82 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/cloud/dialogflow/v2beta1/participant.proto";
-import "google/rpc/status.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ConversationEventProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Represents a notification sent to Pub/Sub subscribers for conversation
-// lifecycle events.
-message ConversationEvent {
-  // Enumeration of the types of events available.
-  enum Type {
-    // Type not set.
-    TYPE_UNSPECIFIED = 0;
-
-    // A new conversation has been opened. This is fired when a telephone call
-    // is answered, or a conversation is created via the API.
-    CONVERSATION_STARTED = 1;
-
-    // An existing conversation has closed. This is fired when a telephone call
-    // is terminated, or a conversation is closed via the API.
-    CONVERSATION_FINISHED = 2;
-
-    // An existing conversation has received a new message, either from API or
-    // telephony. It is configured in
-    // [ConversationProfile.new_message_event_notification_config][google.cloud.dialogflow.v2beta1.ConversationProfile.new_message_event_notification_config]
-    NEW_MESSAGE = 5;
-
-    // Unrecoverable error during a telephone call.
-    //
-    // In general non-recoverable errors only occur if something was
-    // misconfigured in the ConversationProfile corresponding to the call. After
-    // a non-recoverable error, Dialogflow may stop responding.
-    //
-    // We don't fire this event:
-    //
-    // * in an API call because we can directly return the error, or,
-    // * when we can recover from an error.
-    UNRECOVERABLE_ERROR = 4;
-  }
-
-  // Required. The unique identifier of the conversation this notification
-  // refers to.
-  // Format: `projects/<Project ID>/conversations/<Conversation ID>`.
-  string conversation = 1;
-
-  // Required. The type of the event that this notification refers to.
-  Type type = 2;
-
-  // Optional. More detailed information about an error. Only set for type
-  // UNRECOVERABLE_ERROR_IN_PHONE_CALL.
-  google.rpc.Status error_status = 3;
-
-  // Payload of conversation event.
-  oneof payload {
-    // Payload of NEW_MESSAGE event.
-    Message new_message_payload = 4;
-  }
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/conversation_profile.proto b/google/cloud/dialogflow_v2beta1/proto/conversation_profile.proto
deleted file mode 100644
index 24ec8d433..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/conversation_profile.proto
+++ /dev/null
@@ -1,561 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/audio_config.proto";
-import "google/cloud/dialogflow/v2beta1/document.proto";
-import "google/cloud/dialogflow/v2beta1/participant.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ConversationProfileProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [ConversationProfiles][google.cloud.dialogflow.v2beta1.ConversationProfile].
-service ConversationProfiles {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all conversation profiles in the specified project.
-  rpc ListConversationProfiles(ListConversationProfilesRequest) returns (ListConversationProfilesResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/conversationProfiles"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/conversationProfiles"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified conversation profile.
-  rpc GetConversationProfile(GetConversationProfileRequest) returns (ConversationProfile) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/conversationProfiles/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/conversationProfiles/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a conversation profile in the specified project.
-  //
-  // [ConversationProfile.CreateTime][] and [ConversationProfile.UpdateTime][]
-  // aren't populated in the response. You can retrieve them via
-  // [GetConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfiles.GetConversationProfile] API.
-  rpc CreateConversationProfile(CreateConversationProfileRequest) returns (ConversationProfile) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/conversationProfiles"
-      body: "conversation_profile"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/conversationProfiles"
-        body: "conversation_profile"
-      }
-    };
-    option (google.api.method_signature) = "parent,conversation_profile";
-  }
-
-  // Updates the specified conversation profile.
-  //
-  // [ConversationProfile.CreateTime][] and [ConversationProfile.UpdateTime][]
-  // aren't populated in the response. You can retrieve them via
-  // [GetConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfiles.GetConversationProfile] API.
-  rpc UpdateConversationProfile(UpdateConversationProfileRequest) returns (ConversationProfile) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{conversation_profile.name=projects/*/conversationProfiles/*}"
-      body: "conversation_profile"
-      additional_bindings {
-        patch: "/v2beta1/{conversation_profile.name=projects/*/locations/*/conversationProfiles/*}"
-        body: "conversation_profile"
-      }
-    };
-    option (google.api.method_signature) = "conversation_profile,update_mask";
-  }
-
-  // Deletes the specified conversation profile.
-  rpc DeleteConversationProfile(DeleteConversationProfileRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/conversationProfiles/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/conversationProfiles/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-}
-
-// Defines the services to connect to incoming Dialogflow conversations.
-message ConversationProfile {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/ConversationProfile"
-    pattern: "projects/{project}/conversationProfiles/{conversation_profile}"
-    pattern: "projects/{project}/locations/{location}/conversationProfiles/{conversation_profile}"
-  };
-
-  // The unique identifier of this conversation profile.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string name = 1;
-
-  // Required. Human readable name for this profile. Max length 1024 bytes.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Output only. Create time of the conversation profile.
-  google.protobuf.Timestamp create_time = 11 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. Update time of the conversation profile.
-  google.protobuf.Timestamp update_time = 12 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Configuration for an automated agent to use with this profile.
-  AutomatedAgentConfig automated_agent_config = 3;
-
-  // Configuration for agent assistance to use with this profile.
-  HumanAgentAssistantConfig human_agent_assistant_config = 4;
-
-  // Configuration for connecting to a live agent.
-  HumanAgentHandoffConfig human_agent_handoff_config = 5;
-
-  // Configuration for publishing conversation lifecycle events.
-  NotificationConfig notification_config = 6;
-
-  // Configuration for logging conversation lifecycle events.
-  LoggingConfig logging_config = 7;
-
-  // Configuration for publishing new message events. Event will be sent in
-  // format of [ConversationEvent][google.cloud.dialogflow.v2beta1.ConversationEvent]
-  NotificationConfig new_message_event_notification_config = 8;
-
-  // Settings for speech transcription.
-  SpeechToTextConfig stt_config = 9;
-
-  // Language code for the conversation profile. If not specified, the language
-  // is en-US. Language at ConversationProfile should be set for all non en-us
-  // languages.
-  string language_code = 10;
-}
-
-// Defines the Automated Agent to connect to a conversation.
-message AutomatedAgentConfig {
-  // Required. ID of the Dialogflow agent environment to use.
-  //
-  // This project needs to either be the same project as the conversation or you
-  // need to grant `service-<Conversation Project
-  // Number>@gcp-sa-dialogflow.iam.gserviceaccount.com` the `Dialogflow API
-  // Service Agent` role in this project.
-  //
-  // - For ES agents, use format: `projects/<Project ID>/locations/<Location
-  // ID>/agent/environments/<Environment ID or '-'>`. If environment is not
-  // specified, the default `draft` environment is used. Refer to
-  // [DetectIntentRequest](/dialogflow/docs/reference/rpc/google.cloud.dialogflow.v2beta1#google.cloud.dialogflow.v2beta1.DetectIntentRequest)
-  // for more details.
-  //
-  // - For CX agents, use format `projects/<Project ID>/locations/<Location
-  // ID>/agents/<Agent ID>/environments/<Environment ID
-  // or '-'>`. If environment is not specified, the default `draft` environment
-  // is used.
-  string agent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Agent"
-    }
-  ];
-}
-
-// Defines the Human Agent Assistant to connect to a conversation.
-message HumanAgentAssistantConfig {
-  // Settings of suggestion trigger.
-  message SuggestionTriggerSettings {
-    // Do not trigger if last utterance is small talk.
-    bool no_small_talk = 1;
-
-    // Only trigger suggestion if participant role of last utterance is
-    // END_USER.
-    bool only_end_user = 2;
-  }
-
-  // Config for suggestion features.
-  message SuggestionFeatureConfig {
-    // The suggestion feature.
-    SuggestionFeature suggestion_feature = 5;
-
-    // Automatically iterates all participants and tries to compile
-    // suggestions.
-    //
-    // Supported features: ARTICLE_SUGGESTION, FAQ, DIALOGFLOW_ASSIST.
-    bool enable_event_based_suggestion = 3;
-
-    // Settings of suggestion trigger.
-    //
-    // Currently, only ARTICLE_SUGGESTION, FAQ, and DIALOGFLOW_ASSIST will use
-    // this field.
-    SuggestionTriggerSettings suggestion_trigger_settings = 10;
-
-    // Configs of query.
-    SuggestionQueryConfig query_config = 6;
-
-    // Configs of custom conversation model.
-    ConversationModelConfig conversation_model_config = 7;
-  }
-
-  // Detail human agent assistant config.
-  message SuggestionConfig {
-    // Configuration of different suggestion features. One feature can have only
-    // one config.
-    repeated SuggestionFeatureConfig feature_configs = 2;
-
-    // If `group_suggestion_responses` is false, and there are multiple
-    // `feature_configs` in `event based suggestion` or
-    // StreamingAnalyzeContent, we will try to deliver suggestions to customers
-    // as soon as we get new suggestion. Different type of suggestions based on
-    // the same context will be in  separate Pub/Sub event or
-    // `StreamingAnalyzeContentResponse`.
-    //
-    // If `group_suggestion_responses` set to true. All the suggestions to the
-    // same participant based on the same context will be grouped into a single
-    // Pub/Sub event or StreamingAnalyzeContentResponse.
-    bool group_suggestion_responses = 3;
-  }
-
-  // Config for suggestion query.
-  message SuggestionQueryConfig {
-    // Knowledge base source settings.
-    //
-    // Supported features: ARTICLE_SUGGESTION, FAQ.
-    message KnowledgeBaseQuerySource {
-      // Required. Knowledge bases to query. Format:
-      // `projects/<Project ID>/locations/<Location
-      // ID>/knowledgeBases/<Knowledge Base ID>`. Currently, only one knowledge
-      // base is supported.
-      repeated string knowledge_bases = 1 [
-        (google.api.field_behavior) = REQUIRED,
-        (google.api.resource_reference) = {
-          type: "dialogflow.googleapis.com/KnowledgeBase"
-        }
-      ];
-    }
-
-    // Document source settings.
-    //
-    // Supported features: SMART_REPLY, SMART_COMPOSE.
-    message DocumentQuerySource {
-      // Required. Knowledge documents to query from. Format:
-      // `projects/<Project ID>/locations/<Location
-      // ID>/knowledgeBases/<KnowledgeBase ID>/documents/<Document ID>`.
-      // Currently, only one document is supported.
-      repeated string documents = 1 [
-        (google.api.field_behavior) = REQUIRED,
-        (google.api.resource_reference) = {
-          type: "dialogflow.googleapis.com/Document"
-        }
-      ];
-    }
-
-    // Dialogflow source setting.
-    //
-    // Supported feature: DIALOGFLOW_ASSIST.
-    message DialogflowQuerySource {
-      // Required. The name of a dialogflow virtual agent used for end user side intent
-      // detection and suggestion. Format: `projects/<Project Number /
-      // ID>/locations/<Location ID>/agent`. When multiple agents are allowed in
-      // the same Dialogflow project.
-      string agent = 1 [
-        (google.api.field_behavior) = REQUIRED,
-        (google.api.resource_reference) = {
-          type: "dialogflow.googleapis.com/Agent"
-        }
-      ];
-    }
-
-    // Settings that determine how to filter recent conversation context when
-    // generating suggestions.
-    message ContextFilterSettings {
-      // If set to true, the last message from virtual agent (hand off message)
-      // and the message before it (trigger message of hand off) are dropped.
-      bool drop_handoff_messages = 1;
-
-      // If set to true, all messages from virtual agent are dropped.
-      bool drop_virtual_agent_messages = 2;
-
-      // If set to true, all messages from ivr stage are dropped.
-      bool drop_ivr_messages = 3;
-    }
-
-    // Source of query.
-    oneof query_source {
-      // Query from knowledgebase. It is used by:
-      // ARTICLE_SUGGESTION, FAQ.
-      KnowledgeBaseQuerySource knowledge_base_query_source = 1;
-
-      // Query from knowledge base document. It is used by:
-      // SMART_REPLY, SMART_COMPOSE.
-      DocumentQuerySource document_query_source = 2;
-
-      // Query from Dialogflow agent. It is used by DIALOGFLOW_ASSIST.
-      DialogflowQuerySource dialogflow_query_source = 3;
-    }
-
-    // Maximum number of results to return. Currently, if unset, defaults to 10.
-    // And the max number is 20.
-    int32 max_results = 4;
-
-    // Confidence threshold of query result.
-    //
-    // Agent Assist gives each suggestion a score in the range [0.0, 1.0], based
-    // on the relevance between the suggestion and the current conversation
-    // context. A score of 0.0 has no relevance, while a score of 1.0 has high
-    // relevance. Only suggestions with a score greater than or equal to the
-    // value of this field are included in the results.
-    //
-    // For a baseline model (the default), the recommended value is in the range
-    // [0.05, 0.1].
-    //
-    // For a custom model, there is no recommended value. Tune this value by
-    // starting from a very low value and slowly increasing until you have
-    // desired results.
-    //
-    // If this field is not set, it is default to 0.0, which means that all
-    // suggestions are returned.
-    //
-    // Supported features: ARTICLE_SUGGESTION, FAQ, SMART_REPLY, SMART_COMPOSE.
-    float confidence_threshold = 5;
-
-    // Determines how recent conversation context is filtered when generating
-    // suggestions. If unspecified, no messages will be dropped.
-    ContextFilterSettings context_filter_settings = 7;
-  }
-
-  // Custom conversation models used in agent assist feature.
-  //
-  // Supported feature: ARTICLE_SUGGESTION, SMART_COMPOSE, SMART_REPLY.
-  message ConversationModelConfig {
-    // Required. Conversation model resource name. Format: `projects/<Project
-    // ID>/conversationModels/<Model ID>`.
-    string model = 1 [
-      (google.api.field_behavior) = REQUIRED
-    ];
-  }
-
-  // Configuration for analyses to run on each conversation message.
-  message MessageAnalysisConfig {
-    // Enable entity extraction in conversation messages on [agent assist
-    // stage](https://cloud.google.com/dialogflow/priv/docs/contact-center/basics#stages).
-    // If unspecified, defaults to false.
-    bool enable_entity_extraction = 2;
-
-    // Enable sentiment analysis in conversation messages on [agent assist
-    // stage](https://cloud.google.com/dialogflow/priv/docs/contact-center/basics#stages).
-    // If unspecified, defaults to false. Sentiment analysis inspects user input
-    // and identifies the prevailing subjective opinion, especially to determine
-    // a user's attitude as positive, negative, or neutral:
-    // https://cloud.google.com/natural-language/docs/basics#sentiment_analysis
-    // For [Participants.StreamingAnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.StreamingAnalyzeContent] method, result will be in
-    // [StreamingAnalyzeContentResponse.message.SentimentAnalysisResult][google.cloud.dialogflow.v2beta1.StreamingAnalyzeContentResponse.message].
-    // For [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent] method, result will be in
-    // [AnalyzeContentResponse.message.SentimentAnalysisResult][google.cloud.dialogflow.v2beta1.AnalyzeContentResponse.message]
-    // For [Conversations.ListMessages][google.cloud.dialogflow.v2beta1.Conversations.ListMessages] method, result will be in
-    // [ListMessagesResponse.messages.SentimentAnalysisResult][google.cloud.dialogflow.v2beta1.ListMessagesResponse.messages]
-    // If Pub/Sub notification is configured, result will be in
-    // [ConversationEvent.new_message_payload.SentimentAnalysisResult][google.cloud.dialogflow.v2beta1.ConversationEvent.new_message_payload].
-    bool enable_sentiment_analysis = 3;
-  }
-
-  // Pub/Sub topic on which to publish new agent assistant events.
-  NotificationConfig notification_config = 2;
-
-  // Configuration for agent assistance of human agent participant.
-  SuggestionConfig human_agent_suggestion_config = 3;
-
-  // Configuration for agent assistance of end user participant.
-  SuggestionConfig end_user_suggestion_config = 4;
-
-  // Configuration for message analysis.
-  MessageAnalysisConfig message_analysis_config = 5;
-}
-
-// Defines the hand off to a live agent, typically on which external agent
-// service provider to connect to a conversation.
-message HumanAgentHandoffConfig {
-  // Configuration specific to LivePerson (https://www.liveperson.com).
-  message LivePersonConfig {
-    // Required. Account number of the LivePerson account to connect. This is
-    // the account number you input at the login page.
-    string account_number = 1 [(google.api.field_behavior) = REQUIRED];
-  }
-
-  // Configuration specific to Salesforce Live Agent.
-  message SalesforceLiveAgentConfig {
-    // Required. The organization ID of the Salesforce account.
-    string organization_id = 1 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. Live Agent deployment ID.
-    string deployment_id = 2 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. Live Agent chat button ID.
-    string button_id = 3 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. Domain of the Live Agent endpoint for this agent. You can find
-    // the endpoint URL in the `Live Agent settings` page. For example if URL
-    // has the form https://d.la4-c2-phx.salesforceliveagent.com/...,
-    // you should fill in d.la4-c2-phx.salesforceliveagent.com.
-    string endpoint_domain = 4 [(google.api.field_behavior) = REQUIRED];
-  }
-
-  // Required. Specifies which agent service to connect for human agent handoff.
-  oneof agent_service {
-    // Uses LivePerson (https://www.liveperson.com).
-    LivePersonConfig live_person_config = 1;
-
-    // Uses Salesforce Live Agent.
-    SalesforceLiveAgentConfig salesforce_live_agent_config = 2;
-  }
-}
-
-// Defines notification behavior.
-message NotificationConfig {
-  // Format of cloud pub/sub message.
-  enum MessageFormat {
-    // If it is unspecified, PROTO will be used.
-    MESSAGE_FORMAT_UNSPECIFIED = 0;
-
-    // Pubsub message will be serialized proto.
-    PROTO = 1;
-
-    // Pubsub message will be json.
-    JSON = 2;
-  }
-
-  // Name of the Pub/Sub topic to publish conversation
-  // events like
-  // [CONVERSATION_STARTED][google.cloud.dialogflow.v2beta1.ConversationEvent.Type.CONVERSATION_STARTED] as
-  // serialized [ConversationEvent][google.cloud.dialogflow.v2beta1.ConversationEvent] protos.
-  //
-  // Notification works for phone calls, if this topic either is in the same
-  // project as the conversation or you grant `service-<Conversation Project
-  // Number>@gcp-sa-dialogflow.iam.gserviceaccount.com` the `Dialogflow Service
-  // Agent` role in the topic project.
-  //
-  // Format: `projects/<Project ID>/locations/<Location ID>/topics/<Topic ID>`.
-  string topic = 1;
-
-  // Format of message.
-  MessageFormat message_format = 2;
-}
-
-// Defines logging behavior for conversation lifecycle events.
-message LoggingConfig {
-  // Whether to log conversation events like
-  // [CONVERSATION_STARTED][google.cloud.dialogflow.v2beta1.ConversationEvent.Type.CONVERSATION_STARTED] to
-  // Stackdriver in the conversation project as JSON format
-  // [ConversationEvent][google.cloud.dialogflow.v2beta1.ConversationEvent] protos.
-  bool enable_stackdriver_logging = 3;
-}
-
-// The request message for [ConversationProfiles.ListConversationProfiles][google.cloud.dialogflow.v2beta1.ConversationProfiles.ListConversationProfiles].
-message ListConversationProfilesRequest {
-  // Required. The project to list all conversation profiles from.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-
-  // The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for [ConversationProfiles.ListConversationProfiles][google.cloud.dialogflow.v2beta1.ConversationProfiles.ListConversationProfiles].
-message ListConversationProfilesResponse {
-  // The list of project conversation profiles. There is a maximum number
-  // of items returned based on the page_size field in the request.
-  repeated ConversationProfile conversation_profiles = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [ConversationProfiles.GetConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfiles.GetConversationProfile].
-message GetConversationProfileRequest {
-  // Required. The resource name of the conversation profile.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-}
-
-// The request message for [ConversationProfiles.CreateConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfiles.CreateConversationProfile].
-message CreateConversationProfileRequest {
-  // Required. The project to create a conversation profile for.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-
-  // Required. The conversation profile to create.
-  ConversationProfile conversation_profile = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [ConversationProfiles.UpdateConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfiles.UpdateConversationProfile].
-message UpdateConversationProfileRequest {
-  // Required. The conversation profile to update.
-  ConversationProfile conversation_profile = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The mask to control which fields to update.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [ConversationProfiles.DeleteConversationProfile][google.cloud.dialogflow.v2beta1.ConversationProfiles.DeleteConversationProfile].
-//
-// This operation fails if the conversation profile is still referenced from
-// a phone number.
-message DeleteConversationProfileRequest {
-  // Required. The name of the conversation profile to delete.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversationProfiles/<Conversation Profile ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/ConversationProfile"
-    }
-  ];
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/document.proto b/google/cloud/dialogflow_v2beta1/proto/document.proto
deleted file mode 100644
index 0af6eb9e6..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/document.proto
+++ /dev/null
@@ -1,528 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/gcs.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-import "google/rpc/status.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "DocumentProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing knowledge [Documents][google.cloud.dialogflow.v2beta1.Document].
-service Documents {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all documents of the knowledge base.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  rpc ListDocuments(ListDocumentsRequest) returns (ListDocumentsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/knowledgeBases/*}/documents"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/knowledgeBases/*}/documents"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/agent/knowledgeBases/*}/documents"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified document.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  rpc GetDocument(GetDocumentRequest) returns (Document) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/knowledgeBases/*/documents/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/knowledgeBases/*/documents/*}"
-      }
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/agent/knowledgeBases/*/documents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a new document.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  rpc CreateDocument(CreateDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/knowledgeBases/*}/documents"
-      body: "document"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/knowledgeBases/*}/documents"
-        body: "document"
-      }
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/agent/knowledgeBases/*}/documents"
-        body: "document"
-      }
-    };
-    option (google.api.method_signature) = "parent,document";
-    option (google.longrunning.operation_info) = {
-      response_type: "Document"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Create documents by importing data from external sources.
-  rpc ImportDocuments(ImportDocumentsRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/knowledgeBases/*}/documents:import"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/knowledgeBases/*}/documents:import"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "ImportDocumentsResponse"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Deletes the specified document.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  rpc DeleteDocument(DeleteDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/knowledgeBases/*/documents/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/knowledgeBases/*/documents/*}"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/agent/knowledgeBases/*/documents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Updates the specified document.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  rpc UpdateDocument(UpdateDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{document.name=projects/*/knowledgeBases/*/documents/*}"
-      body: "document"
-      additional_bindings {
-        patch: "/v2beta1/{document.name=projects/*/locations/*/knowledgeBases/*/documents/*}"
-        body: "document"
-      }
-      additional_bindings {
-        patch: "/v2beta1/{document.name=projects/*/agent/knowledgeBases/*/documents/*}"
-        body: "document"
-      }
-    };
-    option (google.api.method_signature) = "document,update_mask";
-    option (google.api.method_signature) = "document";
-    option (google.longrunning.operation_info) = {
-      response_type: "Document"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-
-  // Reloads the specified document from its specified source, content_uri or
-  // content. The previously loaded content of the document will be deleted.
-  // Note: Even when the content of the document has not changed, there still
-  // may be side effects because of internal implementation changes.
-  // Note: If the document source is Google Cloud Storage URI, its metadata will
-  // be replaced with the custom metadata from Google Cloud Storage if the
-  // `import_gcs_custom_metadata` field is set to true in the request.
-  //
-  // Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-  // only use `projects.knowledgeBases.documents`.
-  rpc ReloadDocument(ReloadDocumentRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{name=projects/*/knowledgeBases/*/documents/*}:reload"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{name=projects/*/locations/*/knowledgeBases/*/documents/*}:reload"
-        body: "*"
-      }
-      additional_bindings {
-        post: "/v2beta1/{name=projects/*/agent/knowledgeBases/*/documents/*}:reload"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "name,gcs_source";
-    option (google.longrunning.operation_info) = {
-      response_type: "Document"
-      metadata_type: "KnowledgeOperationMetadata"
-    };
-  }
-}
-
-// A knowledge document to be used by a [KnowledgeBase][google.cloud.dialogflow.v2beta1.KnowledgeBase].
-//
-// For more information, see the [knowledge base
-// guide](https://cloud.google.com/dialogflow/docs/how/knowledge-bases).
-//
-// Note: The `projects.agent.knowledgeBases.documents` resource is deprecated;
-// only use `projects.knowledgeBases.documents`.
-message Document {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Document"
-    pattern: "projects/{project}/knowledgeBases/{knowledge_base}/documents/{document}"
-    pattern: "projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}/documents/{document}"
-  };
-
-  // The status of a reload attempt.
-  message ReloadStatus {
-    // Output only. The time of a reload attempt.
-    // This reload may have been triggered automatically or manually and may
-    // not have succeeded.
-    google.protobuf.Timestamp time = 1;
-
-    // Output only. The status of a reload attempt or the initial load.
-    google.rpc.Status status = 2;
-  }
-
-  // The knowledge type of document content.
-  enum KnowledgeType {
-    // The type is unspecified or arbitrary.
-    KNOWLEDGE_TYPE_UNSPECIFIED = 0;
-
-    // The document content contains question and answer pairs as either HTML or
-    // CSV. Typical FAQ HTML formats are parsed accurately, but unusual formats
-    // may fail to be parsed.
-    //
-    // CSV must have questions in the first column and answers in the second,
-    // with no header. Because of this explicit format, they are always parsed
-    // accurately.
-    FAQ = 1;
-
-    // Documents for which unstructured text is extracted and used for
-    // question answering.
-    EXTRACTIVE_QA = 2;
-
-    // The entire document content as a whole can be used for query results.
-    // Only for Contact Center Solutions on Dialogflow.
-    ARTICLE_SUGGESTION = 3;
-
-    // The legacy enum for agent-facing smart reply feature.
-    SMART_REPLY = 4;
-  }
-
-  // Optional. The document resource name.
-  // The name must be empty when creating a document.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. The display name of the document. The name must be 1024 bytes or
-  // less; otherwise, the creation request fails.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The MIME type of this document.
-  string mime_type = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The knowledge type of document content.
-  repeated KnowledgeType knowledge_types = 4 [(google.api.field_behavior) = REQUIRED];
-
-  // The source of this document.
-  oneof source {
-    // The URI where the file content is located.
-    //
-    // For documents stored in Google Cloud Storage, these URIs must have
-    // the form `gs://<bucket-name>/<object-name>`.
-    //
-    // NOTE: External URLs must correspond to public webpages, i.e., they must
-    // be indexed by Google Search. In particular, URLs for showing documents in
-    // Google Cloud Storage (i.e. the URL in your browser) are not supported.
-    // Instead use the `gs://` format URI described above.
-    string content_uri = 5;
-
-    // The raw content of the document. This field is only permitted for
-    // EXTRACTIVE_QA and FAQ knowledge types.
-    // Note: This field is in the process of being deprecated, please use
-    // raw_content instead.
-    string content = 6 [deprecated = true];
-
-    // The raw content of the document. This field is only permitted for
-    // EXTRACTIVE_QA and FAQ knowledge types.
-    bytes raw_content = 9;
-  }
-
-  // Optional. If true, we try to automatically reload the document every day
-  // (at a time picked by the system). If false or unspecified, we don't try
-  // to automatically reload the document.
-  //
-  // Currently you can only enable automatic reload for documents sourced from
-  // a public url, see `source` field for the source types.
-  //
-  // Reload status can be tracked in `latest_reload_status`. If a reload
-  // fails, we will keep the document unchanged.
-  //
-  // If a reload fails with internal errors, the system will try to reload the
-  // document on the next day.
-  // If a reload fails with non-retriable errors (e.g. PERMISION_DENIED), the
-  // system will not try to reload the document anymore. You need to manually
-  // reload the document successfully by calling `ReloadDocument` and clear the
-  // errors.
-  bool enable_auto_reload = 11 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The time and status of the latest reload.
-  // This reload may have been triggered automatically or manually
-  // and may not have succeeded.
-  ReloadStatus latest_reload_status = 12 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Optional. Metadata for the document. The metadata supports arbitrary
-  // key-value pairs. Suggested use cases include storing a document's title,
-  // an external URL distinct from the document's content_uri, etc.
-  // The max size of a `key` or a `value` of the metadata is 1024 bytes.
-  map<string, string> metadata = 7 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Request message for [Documents.GetDocument][google.cloud.dialogflow.v2beta1.Documents.GetDocument].
-message GetDocumentRequest {
-  // Required. The name of the document to retrieve.
-  // Format `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-}
-
-// Request message for [Documents.ListDocuments][google.cloud.dialogflow.v2beta1.Documents.ListDocuments].
-message ListDocumentsRequest {
-  // Required. The knowledge base to list all documents for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // The maximum number of items to return in a single page. By
-  // default 10 and at most 100.
-  int32 page_size = 2;
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-
-  // The filter expression used to filter documents returned by the list method.
-  // The expression has the following syntax:
-  //
-  //   <field> <operator> <value> [AND <field> <operator> <value>] ...
-  //
-  // The following fields and operators are supported:
-  //
-  // * knowledge_types with has(:) operator
-  // * display_name with has(:) operator
-  // * state with equals(=) operator
-  //
-  // Examples:
-  //
-  // * "knowledge_types:FAQ" matches documents with FAQ knowledge type.
-  // * "display_name:customer" matches documents whose display name contains
-  //   "customer".
-  // * "state=ACTIVE" matches documents with ACTIVE state.
-  // * "knowledge_types:FAQ AND state=ACTIVE" matches all active FAQ documents.
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4;
-}
-
-// Response message for [Documents.ListDocuments][google.cloud.dialogflow.v2beta1.Documents.ListDocuments].
-message ListDocumentsResponse {
-  // The list of documents.
-  repeated Document documents = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// Request message for [Documents.CreateDocument][google.cloud.dialogflow.v2beta1.Documents.CreateDocument].
-message CreateDocumentRequest {
-  // Required. The knowledge base to create a document for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // Required. The document to create.
-  Document document = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Whether to import custom metadata from Google Cloud Storage.
-  // Only valid when the document source is Google Cloud Storage URI.
-  bool import_gcs_custom_metadata = 3;
-}
-
-// Request message for [Documents.ImportDocuments][google.cloud.dialogflow.v2beta1.Documents.ImportDocuments].
-message ImportDocumentsRequest {
-  // Required. The knowledge base to import documents into.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // Required. The source to use for importing documents.
-  //
-  // If the source captures multiple objects, then multiple documents will be
-  // created, one corresponding to each object, and all of these documents will
-  // be created using the same document template.
-  oneof source {
-    // The Google Cloud Storage location for the documents.
-    // The path can include a wildcard.
-    //
-    // These URIs may have the forms
-    // `gs://<bucket-name>/<object-name>`.
-    // `gs://<bucket-name>/<object-path>/*.<extension>`.
-    GcsSources gcs_source = 2;
-  }
-
-  // Required. Document template used for importing all the documents.
-  ImportDocumentTemplate document_template = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Whether to import custom metadata from Google Cloud Storage.
-  // Only valid when the document source is Google Cloud Storage URI.
-  bool import_gcs_custom_metadata = 4;
-}
-
-// The template used for importing documents.
-message ImportDocumentTemplate {
-  // Required. The MIME type of the document.
-  string mime_type = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The knowledge type of document content.
-  repeated Document.KnowledgeType knowledge_types = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Metadata for the document. The metadata supports arbitrary
-  // key-value pairs. Suggested use cases include storing a document's title,
-  // an external URL distinct from the document's content_uri, etc.
-  // The max size of a `key` or a `value` of the metadata is 1024 bytes.
-  map<string, string> metadata = 3;
-}
-
-// Response message for [Documents.ImportDocuments][google.cloud.dialogflow.v2beta1.Documents.ImportDocuments].
-message ImportDocumentsResponse {
-  // Includes details about skipped documents or any other warnings.
-  repeated google.rpc.Status warnings = 1;
-}
-
-// Request message for [Documents.DeleteDocument][google.cloud.dialogflow.v2beta1.Documents.DeleteDocument].
-message DeleteDocumentRequest {
-  // Required. The name of the document to delete.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-}
-
-// Request message for [Documents.UpdateDocument][google.cloud.dialogflow.v2beta1.Documents.UpdateDocument].
-message UpdateDocumentRequest {
-  // Required. The document to update.
-  Document document = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Not specified means `update all`.
-  // Currently, only `display_name` can be updated, an InvalidArgument will be
-  // returned for attempting to update other fields.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Metadata in google::longrunning::Operation for Knowledge operations.
-message KnowledgeOperationMetadata {
-  // States of the operation.
-  enum State {
-    // State unspecified.
-    STATE_UNSPECIFIED = 0;
-
-    // The operation has been created.
-    PENDING = 1;
-
-    // The operation is currently running.
-    RUNNING = 2;
-
-    // The operation is done, either cancelled or completed.
-    DONE = 3;
-  }
-
-  // Required. Output only. The current state of this operation.
-  State state = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// Request message for [Documents.ReloadDocument][google.cloud.dialogflow.v2beta1.Documents.ReloadDocument].
-message ReloadDocumentRequest {
-  // Required. The name of the document to reload.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Document"
-    }
-  ];
-
-  // The source for document reloading.
-  // Optional. If provided, the service will load the contents from the source
-  // and update document in the knowledge base.
-  oneof source {
-    // The path for a Cloud Storage source file for reloading document content.
-    // If not provided, the Document's existing source will be reloaded.
-    GcsSource gcs_source = 3;
-  }
-
-  // Whether to import custom metadata from Google Cloud Storage.
-  // Only valid when the document source is Google Cloud Storage URI.
-  bool import_gcs_custom_metadata = 4;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/entity_type.proto b/google/cloud/dialogflow_v2beta1/proto/entity_type.proto
deleted file mode 100644
index a1703f1be..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/entity_type.proto
+++ /dev/null
@@ -1,571 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "EntityTypeProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [EntityTypes][google.cloud.dialogflow.v2beta1.EntityType].
-service EntityTypes {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all entity types in the specified agent.
-  rpc ListEntityTypes(ListEntityTypesRequest) returns (ListEntityTypesResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/agent}/entityTypes"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent}/entityTypes"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.api.method_signature) = "parent,language_code";
-  }
-
-  // Retrieves the specified entity type.
-  rpc GetEntityType(GetEntityTypeRequest) returns (EntityType) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/agent/entityTypes/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/agent/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-    option (google.api.method_signature) = "name,language_code";
-  }
-
-  // Creates an entity type in the specified agent.
-  rpc CreateEntityType(CreateEntityTypeRequest) returns (EntityType) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent}/entityTypes"
-      body: "entity_type"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent}/entityTypes"
-        body: "entity_type"
-      }
-    };
-    option (google.api.method_signature) = "parent,entity_type";
-    option (google.api.method_signature) = "parent,entity_type,language_code";
-  }
-
-  // Updates the specified entity type.
-  rpc UpdateEntityType(UpdateEntityTypeRequest) returns (EntityType) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{entity_type.name=projects/*/agent/entityTypes/*}"
-      body: "entity_type"
-      additional_bindings {
-        patch: "/v2beta1/{entity_type.name=projects/*/locations/*/agent/entityTypes/*}"
-        body: "entity_type"
-      }
-    };
-    option (google.api.method_signature) = "entity_type";
-    option (google.api.method_signature) = "entity_type,language_code";
-    option (google.api.method_signature) = "entity_type,language_code,update_mask";
-  }
-
-  // Deletes the specified entity type.
-  rpc DeleteEntityType(DeleteEntityTypeRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/agent/entityTypes/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/agent/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Updates/Creates multiple entity types in the specified agent.
-  // Operation <response: [BatchUpdateEntityTypesResponse][google.cloud.dialogflow.v2beta1.BatchUpdateEntityTypesResponse]>
-  rpc BatchUpdateEntityTypes(BatchUpdateEntityTypesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent}/entityTypes:batchUpdate"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent}/entityTypes:batchUpdate"
-        body: "*"
-      }
-    };
-    option (google.longrunning.operation_info) = {
-      response_type: "google.cloud.dialogflow.v2beta1.BatchUpdateEntityTypesResponse"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Deletes entity types in the specified agent.
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchDeleteEntityTypes(BatchDeleteEntityTypesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent}/entityTypes:batchDelete"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent}/entityTypes:batchDelete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entity_type_names";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Creates multiple new entities in the specified entity type.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchCreateEntities(BatchCreateEntitiesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent/entityTypes/*}/entities:batchCreate"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/entityTypes/*}/entities:batchCreate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entities";
-    option (google.api.method_signature) = "parent,entities,language_code";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Updates or creates multiple entities in the specified entity type. This
-  // method does not affect entities in the entity type that aren't explicitly
-  // specified in the request.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchUpdateEntities(BatchUpdateEntitiesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent/entityTypes/*}/entities:batchUpdate"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/entityTypes/*}/entities:batchUpdate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entities";
-    option (google.api.method_signature) = "parent,entities,language_code";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Deletes entities in the specified entity type.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchDeleteEntities(BatchDeleteEntitiesRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent/entityTypes/*}/entities:batchDelete"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/entityTypes/*}/entities:batchDelete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,entity_values";
-    option (google.api.method_signature) = "parent,entity_values,language_code";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-}
-
-// Each intent parameter has a type, called the entity type, which dictates
-// exactly how data from an end-user expression is extracted.
-//
-// Dialogflow provides predefined system entities that can match many common
-// types of data. For example, there are system entities for matching dates,
-// times, colors, email addresses, and so on. You can also create your own
-// custom entities for matching custom data. For example, you could define a
-// vegetable entity that can match the types of vegetables available for
-// purchase with a grocery store agent.
-//
-// For more information, see the
-// [Entity guide](https://cloud.google.com/dialogflow/docs/entities-overview).
-message EntityType {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/EntityType"
-    pattern: "projects/{project}/agent/entityTypes/{entity_type}"
-    pattern: "projects/{project}/locations/{location}/agent/entityTypes/{entity_type}"
-  };
-
-  // An **entity entry** for an associated entity type.
-  message Entity {
-    // Required. The primary value associated with this entity entry.
-    // For example, if the entity type is *vegetable*, the value could be
-    // *scallions*.
-    //
-    // For `KIND_MAP` entity types:
-    //
-    // *   A reference value to be used in place of synonyms.
-    //
-    // For `KIND_LIST` entity types:
-    //
-    // *   A string that can contain references to other entity types (with or
-    //     without aliases).
-    string value = 1 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. A collection of value synonyms. For example, if the entity type
-    // is *vegetable*, and `value` is *scallions*, a synonym could be *green
-    // onions*.
-    //
-    // For `KIND_LIST` entity types:
-    //
-    // *   This collection must contain exactly one synonym equal to `value`.
-    repeated string synonyms = 2;
-  }
-
-  // Represents kinds of entities.
-  enum Kind {
-    // Not specified. This value should be never used.
-    KIND_UNSPECIFIED = 0;
-
-    // Map entity types allow mapping of a group of synonyms to a reference
-    // value.
-    KIND_MAP = 1;
-
-    // List entity types contain a set of entries that do not map to reference
-    // values. However, list entity types can contain references to other entity
-    // types (with or without aliases).
-    KIND_LIST = 2;
-
-    // Regexp entity types allow to specify regular expressions in entries
-    // values.
-    KIND_REGEXP = 3;
-  }
-
-  // Represents different entity type expansion modes. Automated expansion
-  // allows an agent to recognize values that have not been explicitly listed in
-  // the entity (for example, new kinds of shopping list items).
-  enum AutoExpansionMode {
-    // Auto expansion disabled for the entity.
-    AUTO_EXPANSION_MODE_UNSPECIFIED = 0;
-
-    // Allows an agent to recognize values that have not been explicitly
-    // listed in the entity.
-    AUTO_EXPANSION_MODE_DEFAULT = 1;
-  }
-
-  // The unique identifier of the entity type.
-  // Required for [EntityTypes.UpdateEntityType][google.cloud.dialogflow.v2beta1.EntityTypes.UpdateEntityType] and
-  // [EntityTypes.BatchUpdateEntityTypes][google.cloud.dialogflow.v2beta1.EntityTypes.BatchUpdateEntityTypes] methods.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/entityTypes/<Entity
-  //   Type ID>`
-  string name = 1;
-
-  // Required. The name of the entity type.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. Indicates the kind of entity type.
-  Kind kind = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Indicates whether the entity type can be automatically
-  // expanded.
-  AutoExpansionMode auto_expansion_mode = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of entity entries associated with the entity type.
-  repeated Entity entities = 6 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Enables fuzzy entity extraction during classification.
-  bool enable_fuzzy_extraction = 7 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.ListEntityTypes][google.cloud.dialogflow.v2beta1.EntityTypes.ListEntityTypes].
-message ListEntityTypesRequest {
-  // Required. The agent to list all entity types from.
-  // Supported formats:
-  // - `projects/<Project ID>/agent`
-  // - `projects/<Project ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 4 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [EntityTypes.ListEntityTypes][google.cloud.dialogflow.v2beta1.EntityTypes.ListEntityTypes].
-message ListEntityTypesResponse {
-  // The list of agent entity types. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated EntityType entity_types = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [EntityTypes.GetEntityType][google.cloud.dialogflow.v2beta1.EntityTypes.GetEntityType].
-message GetEntityTypeRequest {
-  // Required. The name of the entity type.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/entityTypes/<Entity
-  //   Type ID>`
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.CreateEntityType][google.cloud.dialogflow.v2beta1.EntityTypes.CreateEntityType].
-message CreateEntityTypeRequest {
-  // Required. The agent to create a entity type for.
-  // Supported formats:
-  // - `projects/<Project ID>/agent`
-  // - `projects/<Project ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The entity type to create.
-  EntityType entity_type = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.UpdateEntityType][google.cloud.dialogflow.v2beta1.EntityTypes.UpdateEntityType].
-message UpdateEntityTypeRequest {
-  // Required. The entity type to update.
-  EntityType entity_type = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.DeleteEntityType][google.cloud.dialogflow.v2beta1.EntityTypes.DeleteEntityType].
-message DeleteEntityTypeRequest {
-  // Required. The name of the entity type to delete.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/entityTypes/<Entity
-  //   Type ID>`
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-}
-
-// The request message for [EntityTypes.BatchUpdateEntityTypes][google.cloud.dialogflow.v2beta1.EntityTypes.BatchUpdateEntityTypes].
-message BatchUpdateEntityTypesRequest {
-  // Required. The name of the agent to update or create entity types in.
-  // Supported formats:
-  // - `projects/<Project ID>/agent`
-  // - `projects/<Project ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // The source of the entity type batch.
-  //
-  // For each entity type in the batch:
-  //
-  // *   If `name` is specified, we update an existing entity type.
-  // *   If `name` is not specified, we create a new entity type.
-  oneof entity_type_batch {
-    // The URI to a Google Cloud Storage file containing entity types to update
-    // or create. The file format can either be a serialized proto (of
-    // EntityBatch type) or a JSON object. Note: The URI must start with
-    // "gs://".
-    string entity_type_batch_uri = 2;
-
-    // The collection of entity types to update or create.
-    EntityTypeBatch entity_type_batch_inline = 3;
-  }
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 5 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [EntityTypes.BatchUpdateEntityTypes][google.cloud.dialogflow.v2beta1.EntityTypes.BatchUpdateEntityTypes].
-message BatchUpdateEntityTypesResponse {
-  // The collection of updated or created entity types.
-  repeated EntityType entity_types = 1;
-}
-
-// The request message for [EntityTypes.BatchDeleteEntityTypes][google.cloud.dialogflow.v2beta1.EntityTypes.BatchDeleteEntityTypes].
-message BatchDeleteEntityTypesRequest {
-  // Required. The name of the agent to delete all entities types for.
-  // Supported formats:
-  // - `projects/<Project ID>/agent`,
-  // - `projects/<Project ID>/locations/<Location ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The names entity types to delete. All names must point to the
-  // same agent as `parent`.
-  repeated string entity_type_names = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [EntityTypes.BatchCreateEntities][google.cloud.dialogflow.v2beta1.EntityTypes.BatchCreateEntities].
-message BatchCreateEntitiesRequest {
-  // Required. The name of the entity type to create entities in.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/entityTypes/<Entity
-  //   Type ID>`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The entities to create.
-  repeated EntityType.Entity entities = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [EntityTypes.BatchUpdateEntities][google.cloud.dialogflow.v2beta1.EntityTypes.BatchUpdateEntities].
-message BatchUpdateEntitiesRequest {
-  // Required. The name of the entity type to update or create entities in.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/entityTypes/<Entity
-  //   Type ID>`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The entities to update or create.
-  repeated EntityType.Entity entities = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 4;
-}
-
-// The request message for [EntityTypes.BatchDeleteEntities][google.cloud.dialogflow.v2beta1.EntityTypes.BatchDeleteEntities].
-message BatchDeleteEntitiesRequest {
-  // Required. The name of the entity type to delete entries for.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/entityTypes/<Entity Type ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/entityTypes/<Entity
-  //   Type ID>`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/EntityType"
-    }
-  ];
-
-  // Required. The reference `values` of the entities to delete. Note that
-  // these are not fully-qualified names, i.e. they don't start with
-  // `projects/<Project ID>`.
-  repeated string entity_values = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// This message is a wrapper around a collection of entity types.
-message EntityTypeBatch {
-  // A collection of entity types.
-  repeated EntityType entity_types = 1;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/environment.proto b/google/cloud/dialogflow_v2beta1/proto/environment.proto
deleted file mode 100644
index a933b9bea..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/environment.proto
+++ /dev/null
@@ -1,156 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/audio_config.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/timestamp.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "EnvironmentProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [Environments][google.cloud.dialogflow.v2beta1.Environment].
-service Environments {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all non-draft environments of the specified agent.
-  rpc ListEnvironments(ListEnvironmentsRequest) returns (ListEnvironmentsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/agent}/environments"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent}/environments"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-}
-
-// You can create multiple versions of your agent and publish them to separate
-// environments.
-//
-// When you edit an agent, you are editing the draft agent. At any point, you
-// can save the draft agent as an agent version, which is an immutable snapshot
-// of your agent.
-//
-// When you save the draft agent, it is published to the default environment.
-// When you create agent versions, you can publish them to custom environments.
-// You can create a variety of custom environments for:
-//
-// - testing
-// - development
-// - production
-// - etc.
-//
-// For more information, see the [versions and environments
-// guide](https://cloud.google.com/dialogflow/docs/agents-versions).
-message Environment {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Environment"
-    pattern: "projects/{project}/agent/environments/{environment}"
-    pattern: "projects/{project}/locations/{location}/agent/environments/{environment}"
-  };
-
-  // Represents an environment state. When an environment is pointed to a new
-  // agent version, the environment is temporarily set to the `LOADING` state.
-  // During that time, the environment keeps on serving the previous version of
-  // the agent. After the new agent version is done loading, the environment is
-  // set back to the `RUNNING` state.
-  enum State {
-    // Not specified. This value is not used.
-    STATE_UNSPECIFIED = 0;
-
-    // Stopped.
-    STOPPED = 1;
-
-    // Loading.
-    LOADING = 2;
-
-    // Running.
-    RUNNING = 3;
-  }
-
-  // Output only. The unique identifier of this agent environment.
-  // Supported formats:
-  // - `projects/<Project Number / ID>/agent/environments/<Environment ID>`
-  // - `projects/<Project Number / ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>`
-  string name = 1 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Optional. The developer-provided description for this environment.
-  // The maximum length is 500 characters. If exceeded, the request is rejected.
-  string description = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The agent version loaded into this environment.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/versions/<Version ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/versions/<Version
-  //   ID>`
-  string agent_version = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The state of this environment. This field is read-only, i.e., it cannot be
-  // set by create and update methods.
-  State state = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The last update time of this environment. This field is read-only, i.e., it
-  // cannot be set by create and update methods.
-  google.protobuf.Timestamp update_time = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// The request message for [Environments.ListEnvironments][google.cloud.dialogflow.v2beta1.Environments.ListEnvironments].
-message ListEnvironmentsRequest {
-  // Required. The agent to list all environments from.
-  // Format:
-  // - `projects/<Project Number / ID>/agent`
-  // - `projects/<Project Number / ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Environment"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By default 100 and
-  // at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Environments.ListEnvironments][google.cloud.dialogflow.v2beta1.Environments.ListEnvironments].
-message ListEnvironmentsResponse {
-  // The list of agent environments. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Environment environments = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/gcs.proto b/google/cloud/dialogflow_v2beta1/proto/gcs.proto
deleted file mode 100644
index f01ad76f3..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/gcs.proto
+++ /dev/null
@@ -1,46 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/field_behavior.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "GcsProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Google Cloud Storage locations for the inputs.
-message GcsSources {
-  // Required. Google Cloud Storage URIs for the inputs. A URI is of the
-  // form:
-  //   gs://bucket/object-prefix-or-name
-  // Whether a prefix or name is used depends on the use case.
-  repeated string uris = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Google Cloud Storage location for single input.
-message GcsSource {
-  // Required. The Google Cloud Storage URIs for the inputs. A URI is of the
-  // form:
-  //   gs://bucket/object-prefix-or-name
-  // Whether a prefix or name is used depends on the use case.
-  string uri = 1;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/human_agent_assistant_event.proto b/google/cloud/dialogflow_v2beta1/proto/human_agent_assistant_event.proto
deleted file mode 100644
index d49c83acb..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/human_agent_assistant_event.proto
+++ /dev/null
@@ -1,51 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/cloud/dialogflow/v2beta1/participant.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "HumanAgentAssistantEventProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Output only. Represents a notification sent to Pub/Sub subscribers for
-// agent assistant events in a specific conversation.
-message HumanAgentAssistantEvent {
-  // The conversation this notification refers to.
-  // Format: `projects/<Project ID>/conversations/<Conversation ID>`.
-  string conversation = 1;
-
-  // The participant that the suggestion is compiled for. And This field is used
-  // to call [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions] API. Format:
-  // `projects/<Project ID>/conversations/<Conversation
-  // ID>/participants/<Participant ID>`.
-  // It will not be set in legacy workflow.
-  // [HumanAgentAssistantConfig.name][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.name] for more
-  // information.
-  string participant = 3;
-
-  // The suggestion results payload that this notification refers to. It will
-  // only be set when
-  // [HumanAgentAssistantConfig.SuggestionConfig.group_suggestion_responses][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.SuggestionConfig.group_suggestion_responses]
-  // sets to true.
-  repeated SuggestionResult suggestion_results = 5;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/intent.proto b/google/cloud/dialogflow_v2beta1/proto/intent.proto
deleted file mode 100644
index ba8c1f830..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/intent.proto
+++ /dev/null
@@ -1,1411 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/audio_config.proto";
-import "google/cloud/dialogflow/v2beta1/context.proto";
-import "google/longrunning/operations.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "IntentProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [Intents][google.cloud.dialogflow.v2beta1.Intent].
-service Intents {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all intents in the specified agent.
-  rpc ListIntents(ListIntentsRequest) returns (ListIntentsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/agent}/intents"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent}/intents"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/agent/environments/*}/intents"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-    option (google.api.method_signature) = "parent,language_code";
-  }
-
-  // Retrieves the specified intent.
-  rpc GetIntent(GetIntentRequest) returns (Intent) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/agent/intents/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/agent/intents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-    option (google.api.method_signature) = "name,language_code";
-  }
-
-  // Creates an intent in the specified agent.
-  rpc CreateIntent(CreateIntentRequest) returns (Intent) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent}/intents"
-      body: "intent"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent}/intents"
-        body: "intent"
-      }
-    };
-    option (google.api.method_signature) = "parent,intent";
-    option (google.api.method_signature) = "parent,intent,language_code";
-  }
-
-  // Updates the specified intent.
-  rpc UpdateIntent(UpdateIntentRequest) returns (Intent) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{intent.name=projects/*/agent/intents/*}"
-      body: "intent"
-      additional_bindings {
-        patch: "/v2beta1/{intent.name=projects/*/locations/*/agent/intents/*}"
-        body: "intent"
-      }
-    };
-    option (google.api.method_signature) = "intent,update_mask";
-    option (google.api.method_signature) = "intent";
-    option (google.api.method_signature) = "intent,language_code";
-    option (google.api.method_signature) = "intent,language_code,update_mask";
-  }
-
-  // Deletes the specified intent and its direct or indirect followup intents.
-  rpc DeleteIntent(DeleteIntentRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/agent/intents/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/agent/intents/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Updates/Creates multiple intents in the specified agent.
-  //
-  // Operation <response: [BatchUpdateIntentsResponse][google.cloud.dialogflow.v2beta1.BatchUpdateIntentsResponse]>
-  rpc BatchUpdateIntents(BatchUpdateIntentsRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent}/intents:batchUpdate"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent}/intents:batchUpdate"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,intent_batch_uri";
-    option (google.api.method_signature) = "parent,intent_batch_inline";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.cloud.dialogflow.v2beta1.BatchUpdateIntentsResponse"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-
-  // Deletes intents in the specified agent.
-  //
-  // Operation <response: [google.protobuf.Empty][google.protobuf.Empty]>
-  rpc BatchDeleteIntents(BatchDeleteIntentsRequest) returns (google.longrunning.Operation) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent}/intents:batchDelete"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent}/intents:batchDelete"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent,intents";
-    option (google.longrunning.operation_info) = {
-      response_type: "google.protobuf.Empty"
-      metadata_type: "google.protobuf.Struct"
-    };
-  }
-}
-
-// An intent categorizes an end-user's intention for one conversation turn. For
-// each agent, you define many intents, where your combined intents can handle a
-// complete conversation. When an end-user writes or says something, referred to
-// as an end-user expression or end-user input, Dialogflow matches the end-user
-// input to the best intent in your agent. Matching an intent is also known as
-// intent classification.
-//
-// For more information, see the [intent
-// guide](https://cloud.google.com/dialogflow/docs/intents-overview).
-message Intent {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Intent"
-    pattern: "projects/{project}/agent/intents/{intent}"
-    pattern: "projects/{project}/locations/{location}/agent/intents/{intent}"
-  };
-
-  // Represents an example that the agent is trained on.
-  message TrainingPhrase {
-    // Represents a part of a training phrase.
-    message Part {
-      // Required. The text for this part.
-      string text = 1;
-
-      // Optional. The entity type name prefixed with `@`.
-      // This field is required for annotated parts of the training phrase.
-      string entity_type = 2;
-
-      // Optional. The parameter name for the value extracted from the
-      // annotated part of the example.
-      // This field is required for annotated parts of the training phrase.
-      string alias = 3;
-
-      // Optional. Indicates whether the text was manually annotated.
-      // This field is set to true when the Dialogflow Console is used to
-      // manually annotate the part. When creating an annotated part with the
-      // API, you must set this to true.
-      bool user_defined = 4;
-    }
-
-    // Represents different types of training phrases.
-    enum Type {
-      // Not specified. This value should never be used.
-      TYPE_UNSPECIFIED = 0;
-
-      // Examples do not contain @-prefixed entity type names, but example parts
-      // can be annotated with entity types.
-      EXAMPLE = 1;
-
-      // Templates are not annotated with entity types, but they can contain
-      // @-prefixed entity type names as substrings.
-      // Template mode has been deprecated. Example mode is the only supported
-      // way to create new training phrases. If you have existing training
-      // phrases that you've created in template mode, those will continue to
-      // work.
-      TEMPLATE = 2 [deprecated = true];
-    }
-
-    // Output only. The unique identifier of this training phrase.
-    string name = 1;
-
-    // Required. The type of the training phrase.
-    Type type = 2 [(google.api.field_behavior) = REQUIRED];
-
-    // Required. The ordered list of training phrase parts.
-    // The parts are concatenated in order to form the training phrase.
-    //
-    // Note: The API does not automatically annotate training phrases like the
-    // Dialogflow Console does.
-    //
-    // Note: Do not forget to include whitespace at part boundaries,
-    // so the training phrase is well formatted when the parts are concatenated.
-    //
-    // If the training phrase does not need to be annotated with parameters,
-    // you just need a single part with only the [Part.text][google.cloud.dialogflow.v2beta1.Intent.TrainingPhrase.Part.text] field set.
-    //
-    // If you want to annotate the training phrase, you must create multiple
-    // parts, where the fields of each part are populated in one of two ways:
-    //
-    // -   `Part.text` is set to a part of the phrase that has no parameters.
-    // -   `Part.text` is set to a part of the phrase that you want to annotate,
-    //     and the `entity_type`, `alias`, and `user_defined` fields are all
-    //     set.
-    repeated Part parts = 3 [(google.api.field_behavior) = REQUIRED];
-
-    // Optional. Indicates how many times this example was added to
-    // the intent. Each time a developer adds an existing sample by editing an
-    // intent or training, this counter is increased.
-    int32 times_added_count = 4 [(google.api.field_behavior) = OPTIONAL];
-  }
-
-  // Represents intent parameters.
-  message Parameter {
-    // The unique identifier of this parameter.
-    string name = 1;
-
-    // Required. The name of the parameter.
-    string display_name = 2;
-
-    // Optional. The definition of the parameter value. It can be:
-    //
-    // - a constant string,
-    // - a parameter value defined as `$parameter_name`,
-    // - an original parameter value defined as `$parameter_name.original`,
-    // - a parameter value from some context defined as
-    //   `#context_name.parameter_name`.
-    string value = 3;
-
-    // Optional. The default value to use when the `value` yields an empty
-    // result.
-    // Default values can be extracted from contexts by using the following
-    // syntax: `#context_name.parameter_name`.
-    string default_value = 4;
-
-    // Optional. The name of the entity type, prefixed with `@`, that
-    // describes values of the parameter. If the parameter is
-    // required, this must be provided.
-    string entity_type_display_name = 5;
-
-    // Optional. Indicates whether the parameter is required. That is,
-    // whether the intent cannot be completed without collecting the parameter
-    // value.
-    bool mandatory = 6;
-
-    // Optional. The collection of prompts that the agent can present to the
-    // user in order to collect a value for the parameter.
-    repeated string prompts = 7;
-
-    // Optional. Indicates whether the parameter represents a list of values.
-    bool is_list = 8;
-  }
-
-  // Corresponds to the `Response` field in the Dialogflow console.
-  message Message {
-    // The text response message.
-    message Text {
-      // Optional. The collection of the agent's responses.
-      repeated string text = 1;
-    }
-
-    // The image response message.
-    message Image {
-      // Optional. The public URI to an image file.
-      string image_uri = 1;
-
-      // A text description of the image to be used for accessibility,
-      // e.g., screen readers. Required if image_uri is set for CarouselSelect.
-      string accessibility_text = 2;
-    }
-
-    // The quick replies response message.
-    message QuickReplies {
-      // Optional. The title of the collection of quick replies.
-      string title = 1;
-
-      // Optional. The collection of quick replies.
-      repeated string quick_replies = 2;
-    }
-
-    // The card response message.
-    message Card {
-      // Optional. Contains information about a button.
-      message Button {
-        // Optional. The text to show on the button.
-        string text = 1;
-
-        // Optional. The text to send back to the Dialogflow API or a URI to
-        // open.
-        string postback = 2;
-      }
-
-      // Optional. The title of the card.
-      string title = 1;
-
-      // Optional. The subtitle of the card.
-      string subtitle = 2;
-
-      // Optional. The public URI to an image file for the card.
-      string image_uri = 3;
-
-      // Optional. The collection of card buttons.
-      repeated Button buttons = 4;
-    }
-
-    // The simple response message containing speech or text.
-    message SimpleResponse {
-      // One of text_to_speech or ssml must be provided. The plain text of the
-      // speech output. Mutually exclusive with ssml.
-      string text_to_speech = 1;
-
-      // One of text_to_speech or ssml must be provided. Structured spoken
-      // response to the user in the SSML format. Mutually exclusive with
-      // text_to_speech.
-      string ssml = 2;
-
-      // Optional. The text to display.
-      string display_text = 3;
-    }
-
-    // The collection of simple response candidates.
-    // This message in `QueryResult.fulfillment_messages` and
-    // `WebhookResponse.fulfillment_messages` should contain only one
-    // `SimpleResponse`.
-    message SimpleResponses {
-      // Required. The list of simple responses.
-      repeated SimpleResponse simple_responses = 1;
-    }
-
-    // The basic card message. Useful for displaying information.
-    message BasicCard {
-      // The button object that appears at the bottom of a card.
-      message Button {
-        // Opens the given URI.
-        message OpenUriAction {
-          // Required. The HTTP or HTTPS scheme URI.
-          string uri = 1;
-        }
-
-        // Required. The title of the button.
-        string title = 1;
-
-        // Required. Action to take when a user taps on the button.
-        OpenUriAction open_uri_action = 2;
-      }
-
-      // Optional. The title of the card.
-      string title = 1;
-
-      // Optional. The subtitle of the card.
-      string subtitle = 2;
-
-      // Required, unless image is present. The body text of the card.
-      string formatted_text = 3;
-
-      // Optional. The image for the card.
-      Image image = 4;
-
-      // Optional. The collection of card buttons.
-      repeated Button buttons = 5;
-    }
-
-    // The suggestion chip message that the user can tap to quickly post a reply
-    // to the conversation.
-    message Suggestion {
-      // Required. The text shown the in the suggestion chip.
-      string title = 1;
-    }
-
-    // The collection of suggestions.
-    message Suggestions {
-      // Required. The list of suggested replies.
-      repeated Suggestion suggestions = 1;
-    }
-
-    // The suggestion chip message that allows the user to jump out to the app
-    // or website associated with this agent.
-    message LinkOutSuggestion {
-      // Required. The name of the app or site this chip is linking to.
-      string destination_name = 1;
-
-      // Required. The URI of the app or site to open when the user taps the
-      // suggestion chip.
-      string uri = 2;
-    }
-
-    // The card for presenting a list of options to select from.
-    message ListSelect {
-      // An item in the list.
-      message Item {
-        // Required. Additional information about this option.
-        SelectItemInfo info = 1;
-
-        // Required. The title of the list item.
-        string title = 2;
-
-        // Optional. The main text describing the item.
-        string description = 3;
-
-        // Optional. The image to display.
-        Image image = 4;
-      }
-
-      // Optional. The overall title of the list.
-      string title = 1;
-
-      // Required. List items.
-      repeated Item items = 2;
-
-      // Optional. Subtitle of the list.
-      string subtitle = 3 [(google.api.field_behavior) = OPTIONAL];
-    }
-
-    // The card for presenting a carousel of options to select from.
-    message CarouselSelect {
-      // An item in the carousel.
-      message Item {
-        // Required. Additional info about the option item.
-        SelectItemInfo info = 1;
-
-        // Required. Title of the carousel item.
-        string title = 2;
-
-        // Optional. The body text of the card.
-        string description = 3;
-
-        // Optional. The image to display.
-        Image image = 4;
-      }
-
-      // Required. Carousel items.
-      repeated Item items = 1;
-    }
-
-    // Additional info about the select item for when it is triggered in a
-    // dialog.
-    message SelectItemInfo {
-      // Required. A unique key that will be sent back to the agent if this
-      // response is given.
-      string key = 1;
-
-      // Optional. A list of synonyms that can also be used to trigger this
-      // item in dialog.
-      repeated string synonyms = 2;
-    }
-
-    // Plays audio from a file in Telephony Gateway.
-    message TelephonyPlayAudio {
-      // Required. URI to a Google Cloud Storage object containing the audio to
-      // play, e.g., "gs://bucket/object". The object must contain a single
-      // channel (mono) of linear PCM audio (2 bytes / sample) at 8kHz.
-      //
-      // This object must be readable by the `service-<Project
-      // Number>@gcp-sa-dialogflow.iam.gserviceaccount.com` service account
-      // where <Project Number> is the number of the Telephony Gateway project
-      // (usually the same as the Dialogflow agent project). If the Google Cloud
-      // Storage bucket is in the Telephony Gateway project, this permission is
-      // added by default when enabling the Dialogflow V2 API.
-      //
-      // For audio from other sources, consider using the
-      // `TelephonySynthesizeSpeech` message with SSML.
-      string audio_uri = 1;
-    }
-
-    // Synthesizes speech and plays back the synthesized audio to the caller in
-    // Telephony Gateway.
-    //
-    // Telephony Gateway takes the synthesizer settings from
-    // `DetectIntentResponse.output_audio_config` which can either be set
-    // at request-level or can come from the agent-level synthesizer config.
-    message TelephonySynthesizeSpeech {
-      // Required. The source to be synthesized.
-      oneof source {
-        // The raw text to be synthesized.
-        string text = 1;
-
-        // The SSML to be synthesized. For more information, see
-        // [SSML](https://developers.google.com/actions/reference/ssml).
-        string ssml = 2;
-      }
-    }
-
-    // Transfers the call in Telephony Gateway.
-    message TelephonyTransferCall {
-      // Required. The phone number to transfer the call to
-      // in [E.164 format](https://en.wikipedia.org/wiki/E.164).
-      //
-      // We currently only allow transferring to US numbers (+1xxxyyyzzzz).
-      string phone_number = 1;
-    }
-
-    // Rich Business Messaging (RBM) text response with suggestions.
-    message RbmText {
-      // Required. Text sent and displayed to the user.
-      string text = 1;
-
-      // Optional. One or more suggestions to show to the user.
-      repeated RbmSuggestion rbm_suggestion = 2;
-    }
-
-    // Carousel Rich Business Messaging (RBM) rich card.
-    //
-    // Rich cards allow you to respond to users with more vivid content, e.g.
-    // with media and suggestions.
-    //
-    // If you want to show a single card with more control over the layout,
-    // please use [RbmStandaloneCard][google.cloud.dialogflow.v2beta1.Intent.Message.RbmStandaloneCard] instead.
-    message RbmCarouselCard {
-      // The width of the cards in the carousel.
-      enum CardWidth {
-        // Not specified.
-        CARD_WIDTH_UNSPECIFIED = 0;
-
-        // 120 DP. Note that tall media cannot be used.
-        SMALL = 1;
-
-        // 232 DP.
-        MEDIUM = 2;
-      }
-
-      // Required. The width of the cards in the carousel.
-      CardWidth card_width = 1;
-
-      // Required. The cards in the carousel. A carousel must have at least
-      // 2 cards and at most 10.
-      repeated RbmCardContent card_contents = 2;
-    }
-
-    // Standalone Rich Business Messaging (RBM) rich card.
-    //
-    // Rich cards allow you to respond to users with more vivid content, e.g.
-    // with media and suggestions.
-    //
-    // You can group multiple rich cards into one using [RbmCarouselCard][google.cloud.dialogflow.v2beta1.Intent.Message.RbmCarouselCard] but
-    // carousel cards will give you less control over the card layout.
-    message RbmStandaloneCard {
-      // Orientation of the card.
-      enum CardOrientation {
-        // Not specified.
-        CARD_ORIENTATION_UNSPECIFIED = 0;
-
-        // Horizontal layout.
-        HORIZONTAL = 1;
-
-        // Vertical layout.
-        VERTICAL = 2;
-      }
-
-      // Thumbnail preview alignment for standalone cards with horizontal
-      // layout.
-      enum ThumbnailImageAlignment {
-        // Not specified.
-        THUMBNAIL_IMAGE_ALIGNMENT_UNSPECIFIED = 0;
-
-        // Thumbnail preview is left-aligned.
-        LEFT = 1;
-
-        // Thumbnail preview is right-aligned.
-        RIGHT = 2;
-      }
-
-      // Required. Orientation of the card.
-      CardOrientation card_orientation = 1;
-
-      // Required if orientation is horizontal.
-      // Image preview alignment for standalone cards with horizontal layout.
-      ThumbnailImageAlignment thumbnail_image_alignment = 2;
-
-      // Required. Card content.
-      RbmCardContent card_content = 3;
-    }
-
-    // Rich Business Messaging (RBM) Card content
-    message RbmCardContent {
-      // Rich Business Messaging (RBM) Media displayed in Cards
-      // The following media-types are currently supported:
-      //
-      // Image Types
-      //
-      // * image/jpeg
-      // * image/jpg'
-      // * image/gif
-      // * image/png
-      //
-      // Video Types
-      //
-      // * video/h263
-      // * video/m4v
-      // * video/mp4
-      // * video/mpeg
-      // * video/mpeg4
-      // * video/webm
-      message RbmMedia {
-        // Media height
-        enum Height {
-          // Not specified.
-          HEIGHT_UNSPECIFIED = 0;
-
-          // 112 DP.
-          SHORT = 1;
-
-          // 168 DP.
-          MEDIUM = 2;
-
-          // 264 DP. Not available for rich card carousels when the card width
-          // is set to small.
-          TALL = 3;
-        }
-
-        // Required. Publicly reachable URI of the file. The RBM platform
-        // determines the MIME type of the file from the content-type field in
-        // the HTTP headers when the platform fetches the file. The content-type
-        // field must be present and accurate in the HTTP response from the URL.
-        string file_uri = 1;
-
-        // Optional. Publicly reachable URI of the thumbnail.If you don't
-        // provide a thumbnail URI, the RBM platform displays a blank
-        // placeholder thumbnail until the user's device downloads the file.
-        // Depending on the user's setting, the file may not download
-        // automatically and may require the user to tap a download button.
-        string thumbnail_uri = 2;
-
-        // Required for cards with vertical orientation. The height of the media
-        // within a rich card with a vertical layout.
-        // For a standalone card with horizontal layout, height is not
-        // customizable, and this field is ignored.
-        Height height = 3;
-      }
-
-      // Optional. Title of the card (at most 200 bytes).
-      //
-      // At least one of the title, description or media must be set.
-      string title = 1;
-
-      // Optional. Description of the card (at most 2000 bytes).
-      //
-      // At least one of the title, description or media must be set.
-      string description = 2;
-
-      // Optional. However at least one of the title, description or media must
-      // be set. Media (image, GIF or a video) to include in the card.
-      RbmMedia media = 3;
-
-      // Optional. List of suggestions to include in the card.
-      repeated RbmSuggestion suggestions = 4;
-    }
-
-    // Rich Business Messaging (RBM) suggestion. Suggestions allow user to
-    // easily select/click a predefined response or perform an action (like
-    // opening a web uri).
-    message RbmSuggestion {
-      // Predefined suggested response or action for user to choose
-      oneof suggestion {
-        // Predefined replies for user to select instead of typing
-        RbmSuggestedReply reply = 1;
-
-        // Predefined client side actions that user can choose
-        RbmSuggestedAction action = 2;
-      }
-    }
-
-    // Rich Business Messaging (RBM) suggested reply that the user can click
-    // instead of typing in their own response.
-    message RbmSuggestedReply {
-      // Suggested reply text.
-      string text = 1;
-
-      // Opaque payload that the Dialogflow receives in a user event
-      // when the user taps the suggested reply. This data will be also
-      // forwarded to webhook to allow performing custom business logic.
-      string postback_data = 2;
-    }
-
-    // Rich Business Messaging (RBM) suggested client-side action that the user
-    // can choose from the card.
-    message RbmSuggestedAction {
-      // Opens the user's default dialer app with the specified phone number
-      // but does not dial automatically.
-      message RbmSuggestedActionDial {
-        // Required. The phone number to fill in the default dialer app.
-        // This field should be in [E.164](https://en.wikipedia.org/wiki/E.164)
-        // format. An example of a correctly formatted phone number:
-        // +15556767888.
-        string phone_number = 1;
-      }
-
-      // Opens the user's default web browser app to the specified uri
-      // If the user has an app installed that is
-      // registered as the default handler for the URL, then this app will be
-      // opened instead, and its icon will be used in the suggested action UI.
-      message RbmSuggestedActionOpenUri {
-        // Required. The uri to open on the user device
-        string uri = 1;
-      }
-
-      // Opens the device's location chooser so the user can pick a location
-      // to send back to the agent.
-      message RbmSuggestedActionShareLocation {
-
-      }
-
-      // Text to display alongside the action.
-      string text = 1;
-
-      // Opaque payload that the Dialogflow receives in a user event
-      // when the user taps the suggested action. This data will be also
-      // forwarded to webhook to allow performing custom business logic.
-      string postback_data = 2;
-
-      // Action that needs to be triggered.
-      oneof action {
-        // Suggested client side action: Dial a phone number
-        RbmSuggestedActionDial dial = 3;
-
-        // Suggested client side action: Open a URI on device
-        RbmSuggestedActionOpenUri open_url = 4;
-
-        // Suggested client side action: Share user location
-        RbmSuggestedActionShareLocation share_location = 5;
-      }
-    }
-
-    // The media content card for Actions on Google.
-    message MediaContent {
-      // Response media object for media content card.
-      message ResponseMediaObject {
-        // Required. Name of media card.
-        string name = 1;
-
-        // Optional. Description of media card.
-        string description = 2;
-
-        // Image to show with the media card.
-        oneof image {
-          // Optional. Image to display above media content.
-          Image large_image = 3;
-
-          // Optional. Icon to display above media content.
-          Image icon = 4;
-        }
-
-        // Required. Url where the media is stored.
-        string content_url = 5;
-      }
-
-      // Format of response media type.
-      enum ResponseMediaType {
-        // Unspecified.
-        RESPONSE_MEDIA_TYPE_UNSPECIFIED = 0;
-
-        // Response media type is audio.
-        AUDIO = 1;
-      }
-
-      // Optional. What type of media is the content (ie "audio").
-      ResponseMediaType media_type = 1;
-
-      // Required. List of media objects.
-      repeated ResponseMediaObject media_objects = 2;
-    }
-
-    // Browse Carousel Card for Actions on Google.
-    // https://developers.google.com/actions/assistant/responses#browsing_carousel
-    message BrowseCarouselCard {
-      // Browsing carousel tile
-      message BrowseCarouselCardItem {
-        // Actions on Google action to open a given url.
-        message OpenUrlAction {
-          // Type of the URI.
-          enum UrlTypeHint {
-            // Unspecified
-            URL_TYPE_HINT_UNSPECIFIED = 0;
-
-            // Url would be an amp action
-            AMP_ACTION = 1;
-
-            // URL that points directly to AMP content, or to a canonical URL
-            // which refers to AMP content via <link rel="amphtml">.
-            AMP_CONTENT = 2;
-          }
-
-          // Required. URL
-          string url = 1;
-
-          // Optional. Specifies the type of viewer that is used when opening
-          // the URL. Defaults to opening via web browser.
-          UrlTypeHint url_type_hint = 3;
-        }
-
-        // Required. Action to present to the user.
-        OpenUrlAction open_uri_action = 1;
-
-        // Required. Title of the carousel item. Maximum of two lines of text.
-        string title = 2;
-
-        // Optional. Description of the carousel item. Maximum of four lines of
-        // text.
-        string description = 3;
-
-        // Optional. Hero image for the carousel item.
-        Image image = 4;
-
-        // Optional. Text that appears at the bottom of the Browse Carousel
-        // Card. Maximum of one line of text.
-        string footer = 5;
-      }
-
-      // Image display options for Actions on Google. This should be used for
-      // when the image's aspect ratio does not match the image container's
-      // aspect ratio.
-      enum ImageDisplayOptions {
-        // Fill the gaps between the image and the image container with gray
-        // bars.
-        IMAGE_DISPLAY_OPTIONS_UNSPECIFIED = 0;
-
-        // Fill the gaps between the image and the image container with gray
-        // bars.
-        GRAY = 1;
-
-        // Fill the gaps between the image and the image container with white
-        // bars.
-        WHITE = 2;
-
-        // Image is scaled such that the image width and height match or exceed
-        // the container dimensions. This may crop the top and bottom of the
-        // image if the scaled image height is greater than the container
-        // height, or crop the left and right of the image if the scaled image
-        // width is greater than the container width. This is similar to "Zoom
-        // Mode" on a widescreen TV when playing a 4:3 video.
-        CROPPED = 3;
-
-        // Pad the gaps between image and image frame with a blurred copy of the
-        // same image.
-        BLURRED_BACKGROUND = 4;
-      }
-
-      // Required. List of items in the Browse Carousel Card. Minimum of two
-      // items, maximum of ten.
-      repeated BrowseCarouselCardItem items = 1;
-
-      // Optional. Settings for displaying the image. Applies to every image in
-      // [items][google.cloud.dialogflow.v2beta1.Intent.Message.BrowseCarouselCard.items].
-      ImageDisplayOptions image_display_options = 2;
-    }
-
-    // Table card for Actions on Google.
-    message TableCard {
-      // Required. Title of the card.
-      string title = 1;
-
-      // Optional. Subtitle to the title.
-      string subtitle = 2;
-
-      // Optional. Image which should be displayed on the card.
-      Image image = 3;
-
-      // Optional. Display properties for the columns in this table.
-      repeated ColumnProperties column_properties = 4;
-
-      // Optional. Rows in this table of data.
-      repeated TableCardRow rows = 5;
-
-      // Optional. List of buttons for the card.
-      repeated BasicCard.Button buttons = 6;
-    }
-
-    // Column properties for [TableCard][google.cloud.dialogflow.v2beta1.Intent.Message.TableCard].
-    message ColumnProperties {
-      // Text alignments within a cell.
-      enum HorizontalAlignment {
-        // Text is aligned to the leading edge of the column.
-        HORIZONTAL_ALIGNMENT_UNSPECIFIED = 0;
-
-        // Text is aligned to the leading edge of the column.
-        LEADING = 1;
-
-        // Text is centered in the column.
-        CENTER = 2;
-
-        // Text is aligned to the trailing edge of the column.
-        TRAILING = 3;
-      }
-
-      // Required. Column heading.
-      string header = 1;
-
-      // Optional. Defines text alignment for all cells in this column.
-      HorizontalAlignment horizontal_alignment = 2;
-    }
-
-    // Row of [TableCard][google.cloud.dialogflow.v2beta1.Intent.Message.TableCard].
-    message TableCardRow {
-      // Optional. List of cells that make up this row.
-      repeated TableCardCell cells = 1;
-
-      // Optional. Whether to add a visual divider after this row.
-      bool divider_after = 2;
-    }
-
-    // Cell of [TableCardRow][google.cloud.dialogflow.v2beta1.Intent.Message.TableCardRow].
-    message TableCardCell {
-      // Required. Text in this cell.
-      string text = 1;
-    }
-
-    // Represents different platforms that a rich message can be intended for.
-    enum Platform {
-      // Not specified.
-      PLATFORM_UNSPECIFIED = 0;
-
-      // Facebook.
-      FACEBOOK = 1;
-
-      // Slack.
-      SLACK = 2;
-
-      // Telegram.
-      TELEGRAM = 3;
-
-      // Kik.
-      KIK = 4;
-
-      // Skype.
-      SKYPE = 5;
-
-      // Line.
-      LINE = 6;
-
-      // Viber.
-      VIBER = 7;
-
-      // Google Assistant
-      // See [Dialogflow webhook
-      // format](https://developers.google.com/assistant/actions/build/json/dialogflow-webhook-json)
-      ACTIONS_ON_GOOGLE = 8;
-
-      // Telephony Gateway.
-      TELEPHONY = 10;
-
-      // Google Hangouts.
-      GOOGLE_HANGOUTS = 11;
-    }
-
-    // Required. The rich response message.
-    oneof message {
-      // Returns a text response.
-      Text text = 1;
-
-      // Displays an image.
-      Image image = 2;
-
-      // Displays quick replies.
-      QuickReplies quick_replies = 3;
-
-      // Displays a card.
-      Card card = 4;
-
-      // A custom platform-specific response.
-      google.protobuf.Struct payload = 5;
-
-      // Returns a voice or text-only response for Actions on Google.
-      SimpleResponses simple_responses = 7;
-
-      // Displays a basic card for Actions on Google.
-      BasicCard basic_card = 8;
-
-      // Displays suggestion chips for Actions on Google.
-      Suggestions suggestions = 9;
-
-      // Displays a link out suggestion chip for Actions on Google.
-      LinkOutSuggestion link_out_suggestion = 10;
-
-      // Displays a list card for Actions on Google.
-      ListSelect list_select = 11;
-
-      // Displays a carousel card for Actions on Google.
-      CarouselSelect carousel_select = 12;
-
-      // Plays audio from a file in Telephony Gateway.
-      TelephonyPlayAudio telephony_play_audio = 13;
-
-      // Synthesizes speech in Telephony Gateway.
-      TelephonySynthesizeSpeech telephony_synthesize_speech = 14;
-
-      // Transfers the call in Telephony Gateway.
-      TelephonyTransferCall telephony_transfer_call = 15;
-
-      // Rich Business Messaging (RBM) text response.
-      //
-      // RBM allows businesses to send enriched and branded versions of SMS. See
-      // https://jibe.google.com/business-messaging.
-      RbmText rbm_text = 18;
-
-      // Standalone Rich Business Messaging (RBM) rich card response.
-      RbmStandaloneCard rbm_standalone_rich_card = 19;
-
-      // Rich Business Messaging (RBM) carousel rich card response.
-      RbmCarouselCard rbm_carousel_rich_card = 20;
-
-      // Browse carousel card for Actions on Google.
-      BrowseCarouselCard browse_carousel_card = 22;
-
-      // Table card for Actions on Google.
-      TableCard table_card = 23;
-
-      // The media content card for Actions on Google.
-      MediaContent media_content = 24;
-    }
-
-    // Optional. The platform that this message is intended for.
-    Platform platform = 6 [(google.api.field_behavior) = OPTIONAL];
-  }
-
-  // Represents a single followup intent in the chain.
-  message FollowupIntentInfo {
-    // The unique identifier of the followup intent.
-    // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-    string followup_intent_name = 1;
-
-    // The unique identifier of the followup intent's parent.
-    // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-    string parent_followup_intent_name = 2;
-  }
-
-  // Represents the different states that webhooks can be in.
-  enum WebhookState {
-    // Webhook is disabled in the agent and in the intent.
-    WEBHOOK_STATE_UNSPECIFIED = 0;
-
-    // Webhook is enabled in the agent and in the intent.
-    WEBHOOK_STATE_ENABLED = 1;
-
-    // Webhook is enabled in the agent and in the intent. Also, each slot
-    // filling prompt is forwarded to the webhook.
-    WEBHOOK_STATE_ENABLED_FOR_SLOT_FILLING = 2;
-  }
-
-  // Optional. The unique identifier of this intent.
-  // Required for [Intents.UpdateIntent][google.cloud.dialogflow.v2beta1.Intents.UpdateIntent] and [Intents.BatchUpdateIntents][google.cloud.dialogflow.v2beta1.Intents.BatchUpdateIntents]
-  // methods.
-  // Supported formats:
-  //
-  // - `projects/<Project ID>/agent/intents/<Intent ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/intents/<Intent ID>`
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. The name of this intent.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Indicates whether webhooks are enabled for the intent.
-  WebhookState webhook_state = 6 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The priority of this intent. Higher numbers represent higher
-  // priorities.
-  //
-  // - If the supplied value is unspecified or 0, the service
-  //   translates the value to 500,000, which corresponds to the
-  //   `Normal` priority in the console.
-  // - If the supplied value is negative, the intent is ignored
-  //   in runtime detect intent requests.
-  int32 priority = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates whether this is a fallback intent.
-  bool is_fallback = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates whether Machine Learning is enabled for the intent.
-  // Note: If `ml_enabled` setting is set to false, then this intent is not
-  // taken into account during inference in `ML ONLY` match mode. Also,
-  // auto-markup in the UI is turned off.
-  // DEPRECATED! Please use `ml_disabled` field instead.
-  // NOTE: If both `ml_enabled` and `ml_disabled` are either not set or false,
-  // then the default value is determined as follows:
-  //
-  // - Before April 15th, 2018 the default is:
-  //   ml_enabled = false / ml_disabled = true.
-  // - After April 15th, 2018 the default is:
-  //   ml_enabled = true / ml_disabled = false.
-  bool ml_enabled = 5 [
-    deprecated = true,
-    (google.api.field_behavior) = OPTIONAL
-  ];
-
-  // Optional. Indicates whether Machine Learning is disabled for the intent.
-  // Note: If `ml_disabled` setting is set to true, then this intent is not
-  // taken into account during inference in `ML ONLY` match mode. Also,
-  // auto-markup in the UI is turned off.
-  bool ml_disabled = 19 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates that a live agent should be brought in to handle the
-  // interaction with the user. In most cases, when you set this flag to true,
-  // you would also want to set end_interaction to true as well. Default is
-  // false.
-  bool live_agent_handoff = 20 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates that this intent ends an interaction. Some integrations
-  // (e.g., Actions on Google or Dialogflow phone gateway) use this information
-  // to close interaction with an end user. Default is false.
-  bool end_interaction = 21 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The list of context names required for this intent to be
-  // triggered.
-  // Formats:
-  //
-  // - `projects/<Project ID>/agent/sessions/-/contexts/<Context ID>`
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/sessions/-/contexts/<Context ID>`
-  repeated string input_context_names = 7 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of event names that trigger the intent.
-  // If the collection of input contexts is not empty, all of the contexts must
-  // be present in the active user session for an event to trigger this intent.
-  // Event names are limited to 150 characters.
-  repeated string events = 8 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of examples that the agent is
-  // trained on.
-  repeated TrainingPhrase training_phrases = 9 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The name of the action associated with the intent.
-  // Note: The action name must not contain whitespaces.
-  string action = 10 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of contexts that are activated when the intent
-  // is matched. Context messages in this collection should not set the
-  // parameters field. Setting the `lifespan_count` to 0 will reset the context
-  // when the intent is matched.
-  // Format: `projects/<Project ID>/agent/sessions/-/contexts/<Context ID>`.
-  repeated Context output_contexts = 11 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. Indicates whether to delete all contexts in the current
-  // session when this intent is matched.
-  bool reset_contexts = 12 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of parameters associated with the intent.
-  repeated Parameter parameters = 13 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The collection of rich messages corresponding to the
-  // `Response` field in the Dialogflow console.
-  repeated Message messages = 14;
-
-  // Optional. The list of platforms for which the first responses will be
-  // copied from the messages in PLATFORM_UNSPECIFIED (i.e. default platform).
-  repeated Message.Platform default_response_platforms = 15 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The unique identifier of the root intent in the chain of
-  // followup intents. It identifies the correct followup intents chain for
-  // this intent.
-  //
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string root_followup_intent_name = 16 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Optional. The unique identifier of the parent intent in the
-  // chain of followup intents. You can set this field when creating an intent,
-  // for example with [CreateIntent][google.cloud.dialogflow.v2beta1.Intents.CreateIntent] or
-  // [BatchUpdateIntents][google.cloud.dialogflow.v2beta1.Intents.BatchUpdateIntents], in order to make this
-  // intent a followup intent.
-  //
-  // It identifies the parent followup intent.
-  // Format: `projects/<Project ID>/agent/intents/<Intent ID>`.
-  string parent_followup_intent_name = 17 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. Information about all followup intents that have this intent as
-  // a direct or indirect parent. We populate this field only in the output.
-  repeated FollowupIntentInfo followup_intent_info = 18 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// The request message for [Intents.ListIntents][google.cloud.dialogflow.v2beta1.Intents.ListIntents].
-message ListIntentsRequest {
-  // Required. The agent to list all intents from.
-  // Format: `projects/<Project ID>/agent`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 3;
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 4;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 5;
-}
-
-// The response message for [Intents.ListIntents][google.cloud.dialogflow.v2beta1.Intents.ListIntents].
-message ListIntentsResponse {
-  // The list of agent intents. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Intent intents = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Intents.GetIntent][google.cloud.dialogflow.v2beta1.Intents.GetIntent].
-message GetIntentRequest {
-  // Required. The name of the intent.
-  // Supported formats:
-  //
-  // - `projects/<Project ID>/agent/intents/<Intent ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/intents/<Intent ID>`
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 3;
-}
-
-// The request message for [Intents.CreateIntent][google.cloud.dialogflow.v2beta1.Intents.CreateIntent].
-message CreateIntentRequest {
-  // Required. The agent to create a intent for.
-  // Supported formats:
-  //
-  // - `projects/<Project ID>/agent`
-  // - `projects/<Project ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Required. The intent to create.
-  Intent intent = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 4;
-}
-
-// The request message for [Intents.UpdateIntent][google.cloud.dialogflow.v2beta1.Intents.UpdateIntent].
-message UpdateIntentRequest {
-  // Required. The intent to update.
-  Intent intent = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 3;
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 4;
-}
-
-// The request message for [Intents.DeleteIntent][google.cloud.dialogflow.v2beta1.Intents.DeleteIntent].
-message DeleteIntentRequest {
-  // Required. The name of the intent to delete. If this intent has direct or
-  // indirect followup intents, we also delete them.
-  //
-  // Supported formats:
-  //
-  // - `projects/<Project ID>/agent/intents/<Intent ID>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/intents/<Intent ID>`
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-}
-
-// The request message for [Intents.BatchUpdateIntents][google.cloud.dialogflow.v2beta1.Intents.BatchUpdateIntents].
-message BatchUpdateIntentsRequest {
-  // Required. The name of the agent to update or create intents in.
-  // Supported formats:
-  //
-  // - `projects/<Project ID>/agent`
-  // - `projects/<Project ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Required. The source of the intent batch.
-  //
-  // For each intent in the batch:
-  //
-  // *    If `name` is specified, we update an existing intent.
-  // *    If `name` is not specified, we create a new intent.
-  oneof intent_batch {
-    // The URI to a Google Cloud Storage file containing intents to update or
-    // create. The file format can either be a serialized proto (of IntentBatch
-    // type) or JSON object. Note: The URI must start with "gs://".
-    string intent_batch_uri = 2;
-
-    // The collection of intents to update or create.
-    IntentBatch intent_batch_inline = 3;
-  }
-
-  // Optional. The language used to access language-specific data.
-  // If not specified, the agent's default language is used.
-  // For more information, see
-  // [Multilingual intent and entity
-  // data](https://cloud.google.com/dialogflow/docs/agents-multilingual#intent-entity).
-  string language_code = 4 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 5;
-
-  // Optional. The resource view to apply to the returned intent.
-  IntentView intent_view = 6;
-}
-
-// The response message for [Intents.BatchUpdateIntents][google.cloud.dialogflow.v2beta1.Intents.BatchUpdateIntents].
-message BatchUpdateIntentsResponse {
-  // The collection of updated or created intents.
-  repeated Intent intents = 1;
-}
-
-// The request message for [Intents.BatchDeleteIntents][google.cloud.dialogflow.v2beta1.Intents.BatchDeleteIntents].
-message BatchDeleteIntentsRequest {
-  // Required. The name of the agent to delete all entities types for.
-  // Supported formats:
-  //
-  // - `projects/<Project ID>/agent`
-  // - `projects/<Project ID>/locations/<Location ID>/agent`
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Intent"
-    }
-  ];
-
-  // Required. The collection of intents to delete. Only intent `name` must be
-  // filled in.
-  repeated Intent intents = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// This message is a wrapper around a collection of intents.
-message IntentBatch {
-  // A collection of intents.
-  repeated Intent intents = 1;
-}
-
-// Represents the options for views of an intent.
-// An intent can be a sizable object. Therefore, we provide a resource view that
-// does not return training phrases in the response by default.
-enum IntentView {
-  // Training phrases field is not populated in the response.
-  INTENT_VIEW_UNSPECIFIED = 0;
-
-  // All fields are populated.
-  INTENT_VIEW_FULL = 1;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/knowledge_base.proto b/google/cloud/dialogflow_v2beta1/proto/knowledge_base.proto
deleted file mode 100644
index fe50073bc..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/knowledge_base.proto
+++ /dev/null
@@ -1,278 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "KnowledgeBaseProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [KnowledgeBases][google.cloud.dialogflow.v2beta1.KnowledgeBase].
-service KnowledgeBases {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all knowledge bases of the specified agent.
-  //
-  // Note: The `projects.agent.knowledgeBases` resource is deprecated;
-  // only use `projects.knowledgeBases`.
-  rpc ListKnowledgeBases(ListKnowledgeBasesRequest) returns (ListKnowledgeBasesResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*}/knowledgeBases"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*}/knowledgeBases"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/agent}/knowledgeBases"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified knowledge base.
-  //
-  // Note: The `projects.agent.knowledgeBases` resource is deprecated;
-  // only use `projects.knowledgeBases`.
-  rpc GetKnowledgeBase(GetKnowledgeBaseRequest) returns (KnowledgeBase) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/knowledgeBases/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/knowledgeBases/*}"
-      }
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/agent/knowledgeBases/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a knowledge base.
-  //
-  // Note: The `projects.agent.knowledgeBases` resource is deprecated;
-  // only use `projects.knowledgeBases`.
-  rpc CreateKnowledgeBase(CreateKnowledgeBaseRequest) returns (KnowledgeBase) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*}/knowledgeBases"
-      body: "knowledge_base"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*}/knowledgeBases"
-        body: "knowledge_base"
-      }
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/agent}/knowledgeBases"
-        body: "knowledge_base"
-      }
-    };
-    option (google.api.method_signature) = "parent,knowledge_base";
-  }
-
-  // Deletes the specified knowledge base.
-  //
-  // Note: The `projects.agent.knowledgeBases` resource is deprecated;
-  // only use `projects.knowledgeBases`.
-  rpc DeleteKnowledgeBase(DeleteKnowledgeBaseRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/knowledgeBases/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/knowledgeBases/*}"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/agent/knowledgeBases/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Updates the specified knowledge base.
-  //
-  // Note: The `projects.agent.knowledgeBases` resource is deprecated;
-  // only use `projects.knowledgeBases`.
-  rpc UpdateKnowledgeBase(UpdateKnowledgeBaseRequest) returns (KnowledgeBase) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{knowledge_base.name=projects/*/knowledgeBases/*}"
-      body: "knowledge_base"
-      additional_bindings {
-        patch: "/v2beta1/{knowledge_base.name=projects/*/locations/*/knowledgeBases/*}"
-        body: "knowledge_base"
-      }
-      additional_bindings {
-        patch: "/v2beta1/{knowledge_base.name=projects/*/agent/knowledgeBases/*}"
-        body: "knowledge_base"
-      }
-    };
-    option (google.api.method_signature) = "knowledge_base,update_mask";
-    option (google.api.method_signature) = "knowledge_base";
-  }
-}
-
-// A knowledge base represents a collection of knowledge documents that you
-// provide to Dialogflow. Your knowledge documents contain information that may
-// be useful during conversations with end-users. Some Dialogflow features use
-// knowledge bases when looking for a response to an end-user input.
-//
-// For more information, see the [knowledge base
-// guide](https://cloud.google.com/dialogflow/docs/how/knowledge-bases).
-//
-// Note: The `projects.agent.knowledgeBases` resource is deprecated;
-// only use `projects.knowledgeBases`.
-message KnowledgeBase {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/KnowledgeBase"
-    pattern: "projects/{project}/knowledgeBases/{knowledge_base}"
-    pattern: "projects/{project}/locations/{location}/knowledgeBases/{knowledge_base}"
-  };
-
-  // The knowledge base resource name.
-  // The name must be empty when creating a knowledge base.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string name = 1;
-
-  // Required. The display name of the knowledge base. The name must be 1024
-  // bytes or less; otherwise, the creation request fails.
-  string display_name = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Language which represents the KnowledgeBase. When the KnowledgeBase is
-  // created/updated, this is populated for all non en-us languages. If not
-  // populated, the default language en-us applies.
-  string language_code = 4;
-}
-
-// Request message for [KnowledgeBases.ListKnowledgeBases][google.cloud.dialogflow.v2beta1.KnowledgeBases.ListKnowledgeBases].
-message ListKnowledgeBasesRequest {
-  // Required. The project to list of knowledge bases for.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-
-  // The maximum number of items to return in a single page. By
-  // default 10 and at most 100.
-  int32 page_size = 2;
-
-  // The next_page_token value returned from a previous list request.
-  string page_token = 3;
-
-  // The filter expression used to filter knowledge bases returned by the list
-  // method. The expression has the following syntax:
-  //
-  //   <field> <operator> <value> [AND <field> <operator> <value>] ...
-  //
-  // The following fields and operators are supported:
-  //
-  // * display_name with has(:) operator
-  // * language_code with equals(=) operator
-  //
-  // Examples:
-  //
-  // * 'language_code=en-us' matches knowledge bases with en-us language code.
-  // * 'display_name:articles' matches knowledge bases whose display name
-  //   contains "articles".
-  // * 'display_name:"Best Articles"' matches knowledge bases whose display
-  //   name contains "Best Articles".
-  // * 'language_code=en-gb AND display_name=articles' matches all knowledge
-  //   bases whose display name contains "articles" and whose language code is
-  //   "en-gb".
-  //
-  // Note: An empty filter string (i.e. "") is a no-op and will result in no
-  // filtering.
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4;
-}
-
-// Response message for [KnowledgeBases.ListKnowledgeBases][google.cloud.dialogflow.v2beta1.KnowledgeBases.ListKnowledgeBases].
-message ListKnowledgeBasesResponse {
-  // The list of knowledge bases.
-  repeated KnowledgeBase knowledge_bases = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// Request message for [KnowledgeBases.GetKnowledgeBase][google.cloud.dialogflow.v2beta1.KnowledgeBases.GetKnowledgeBase].
-message GetKnowledgeBaseRequest {
-  // Required. The name of the knowledge base to retrieve.
-  // Format `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-}
-
-// Request message for [KnowledgeBases.CreateKnowledgeBase][google.cloud.dialogflow.v2beta1.KnowledgeBases.CreateKnowledgeBase].
-message CreateKnowledgeBaseRequest {
-  // Required. The project to create a knowledge base for.
-  // Format: `projects/<Project ID>/locations/<Location ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-
-  // Required. The knowledge base to create.
-  KnowledgeBase knowledge_base = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Request message for [KnowledgeBases.DeleteKnowledgeBase][google.cloud.dialogflow.v2beta1.KnowledgeBases.DeleteKnowledgeBase].
-message DeleteKnowledgeBaseRequest {
-  // Required. The name of the knowledge base to delete.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/knowledgeBases/<Knowledge Base ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/KnowledgeBase"
-    }
-  ];
-
-  // Optional. Force deletes the knowledge base. When set to true, any documents
-  // in the knowledge base are also deleted.
-  bool force = 2 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Request message for [KnowledgeBases.UpdateKnowledgeBase][google.cloud.dialogflow.v2beta1.KnowledgeBases.UpdateKnowledgeBase].
-message UpdateKnowledgeBaseRequest {
-  // Required. The knowledge base to update.
-  KnowledgeBase knowledge_base = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. Not specified means `update all`.
-  // Currently, only `display_name` can be updated, an InvalidArgument will be
-  // returned for attempting to update other fields.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = OPTIONAL];
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/participant.proto b/google/cloud/dialogflow_v2beta1/proto/participant.proto
deleted file mode 100644
index 39d0384ea..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/participant.proto
+++ /dev/null
@@ -1,1027 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/audio_config.proto";
-import "google/cloud/dialogflow/v2beta1/session.proto";
-import "google/protobuf/any.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-import "google/protobuf/timestamp.proto";
-import "google/rpc/status.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ParticipantProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [Participants][google.cloud.dialogflow.v2beta1.Participant].
-service Participants {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Creates a new participant in a conversation.
-  rpc CreateParticipant(CreateParticipantRequest) returns (Participant) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/conversations/*}/participants"
-      body: "participant"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/conversations/*}/participants"
-        body: "participant"
-      }
-    };
-    option (google.api.method_signature) = "parent,participant";
-  }
-
-  // Retrieves a conversation participant.
-  rpc GetParticipant(GetParticipantRequest) returns (Participant) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/conversations/*/participants/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/conversations/*/participants/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Returns the list of all participants in the specified conversation.
-  rpc ListParticipants(ListParticipantsRequest) returns (ListParticipantsResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/conversations/*}/participants"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/conversations/*}/participants"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Updates the specified participant.
-  rpc UpdateParticipant(UpdateParticipantRequest) returns (Participant) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{participant.name=projects/*/conversations/*/participants/*}"
-      body: "participant"
-      additional_bindings {
-        patch: "/v2beta1/{participant.name=projects/*/locations/*/conversations/*/participants/*}"
-        body: "participant"
-      }
-    };
-    option (google.api.method_signature) = "participant,update_mask";
-  }
-
-  // Adds a text (chat, for example), or audio (phone recording, for example)
-  // message from a participant into the conversation.
-  //
-  // Note: Always use agent versions for production traffic
-  // sent to virtual agents. See [Versions and
-  // environments(https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  rpc AnalyzeContent(AnalyzeContentRequest) returns (AnalyzeContentResponse) {
-    option (google.api.http) = {
-      post: "/v2beta1/{participant=projects/*/conversations/*/participants/*}:analyzeContent"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{participant=projects/*/locations/*/conversations/*/participants/*}:analyzeContent"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "participant,text_input";
-    option (google.api.method_signature) = "participant,event_input";
-  }
-
-  // Gets suggested articles for a participant based on specific historical
-  // messages.
-  //
-  // Note that [ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions] will only list the auto-generated
-  // suggestions, while [CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion] will try to compile suggestion
-  // based on the provided conversation context in the real time.
-  rpc SuggestArticles(SuggestArticlesRequest) returns (SuggestArticlesResponse) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestArticles"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/conversations/*/participants/*}/suggestions:suggestArticles"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Gets suggested faq answers for a participant based on specific historical
-  // messages.
-  rpc SuggestFaqAnswers(SuggestFaqAnswersRequest) returns (SuggestFaqAnswersResponse) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestFaqAnswers"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/conversations/*/participants/*}/suggestions:suggestFaqAnswers"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Gets smart replies for a participant based on specific historical
-  // messages.
-  rpc SuggestSmartReplies(SuggestSmartRepliesRequest) returns (SuggestSmartRepliesResponse) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/conversations/*/participants/*}/suggestions:suggestSmartReplies"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/conversations/*/participants/*}/suggestions:suggestSmartReplies"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Deprecated: Use inline suggestion, event based suggestion or
-  // Suggestion* API instead.
-  // See [HumanAgentAssistantConfig.name][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.name] for more
-  // details.
-  // Removal Date: 2020-09-01.
-  //
-  // Retrieves suggestions for live agents.
-  //
-  // This method should be used by human agent client software to fetch auto
-  // generated suggestions in real-time, while the conversation with an end user
-  // is in progress. The functionality is implemented in terms of the
-  // [list pagination](https://cloud.google.com/apis/design/design_patterns#list_pagination)
-  // design pattern. The client app should use the `next_page_token` field
-  // to fetch the next batch of suggestions. `suggestions` are sorted by
-  // `create_time` in descending order.
-  // To fetch latest suggestion, just set `page_size` to 1.
-  // To fetch new suggestions without duplication, send request with filter
-  // `create_time_epoch_microseconds > [first item's create_time of previous
-  // request]` and empty page_token.
-  rpc ListSuggestions(ListSuggestionsRequest) returns (ListSuggestionsResponse) {
-    option deprecated = true;
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/conversations/*/participants/*}/suggestions"
-    };
-  }
-
-  // Deprecated. use [SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles] and [SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers] instead.
-  //
-  // Gets suggestions for a participant based on specific historical
-  // messages.
-  //
-  // Note that [ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions] will only list the auto-generated
-  // suggestions, while [CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion] will try to compile suggestion
-  // based on the provided conversation context in the real time.
-  rpc CompileSuggestion(CompileSuggestionRequest) returns (CompileSuggestionResponse) {
-    option deprecated = true;
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/conversations/*/participants/*}/suggestions:compile"
-      body: "*"
-    };
-  }
-}
-
-// Represents a conversation participant (human agent, virtual agent, end-user).
-message Participant {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Participant"
-    pattern: "projects/{project}/conversations/{conversation}/participants/{participant}"
-    pattern: "projects/{project}/locations/{location}/conversations/{conversation}/participants/{participant}"
-  };
-
-  // Enumeration of the roles a participant can play in a conversation.
-  enum Role {
-    // Participant role not set.
-    ROLE_UNSPECIFIED = 0;
-
-    // Participant is a human agent.
-    HUMAN_AGENT = 1;
-
-    // Participant is an automated agent, such as a Dialogflow agent.
-    AUTOMATED_AGENT = 2;
-
-    // Participant is an end user that has called or chatted with
-    // Dialogflow services.
-    END_USER = 3;
-  }
-
-  // Optional. The unique identifier of this participant.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Immutable. The role this participant plays in the conversation. This field must be set
-  // during participant creation and is then immutable.
-  Role role = 2 [(google.api.field_behavior) = IMMUTABLE];
-
-  // Optional. Obfuscated user id that should be associated with the created participant.
-  //
-  // You can specify a user id as follows:
-  //
-  // 1. If you set this field in
-  //    [CreateParticipantRequest][google.cloud.dialogflow.v2beta1.CreateParticipantRequest.participant] or
-  //    [UpdateParticipantRequest][google.cloud.dialogflow.v2beta1.UpdateParticipantRequest.participant],
-  //    Dialogflow adds the obfuscated user id with the participant.
-  //
-  // 2. If you set this field in
-  //    [AnalyzeContent][google.cloud.dialogflow.v2beta1.AnalyzeContentRequest.obfuscated_external_user_id] or
-  //    [StreamingAnalyzeContent][google.cloud.dialogflow.v2beta1.StreamingAnalyzeContentRequest.obfuscated_external_user_id],
-  //    Dialogflow will update [Participant.obfuscated_external_user_id][google.cloud.dialogflow.v2beta1.Participant.obfuscated_external_user_id].
-  //
-  // Dialogflow uses this user id for following purposes:
-  // 1) Billing and measurement. If user with the same
-  // obfuscated_external_user_id is created in a later conversation, dialogflow
-  // will know it's the same user. 2) Agent assist suggestion personalization.
-  // For example, Dialogflow can use it to provide personalized smart reply
-  // suggestions for this user.
-  //
-  // Note:
-  //
-  // * Please never pass raw user ids to Dialogflow. Always obfuscate your user
-  //   id first.
-  // * Dialogflow only accepts a UTF-8 encoded string, e.g., a hex digest of a
-  //   hash function like SHA-512.
-  // * The length of the user id must be <= 256 characters.
-  string obfuscated_external_user_id = 7 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// Represents a message posted into a conversation.
-message Message {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/Message"
-    pattern: "projects/{project}/conversations/{conversation}/messages/{message}"
-    pattern: "projects/{project}/locations/{location}/conversations/{conversation}/messages/{message}"
-  };
-
-  // Optional. The unique identifier of the message.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string name = 1 [(google.api.field_behavior) = OPTIONAL];
-
-  // Required. The message content.
-  string content = 2 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The message language.
-  // This should be a [BCP-47](https://www.rfc-editor.org/rfc/bcp/bcp47.txt)
-  // language tag. Example: "en-US".
-  string language_code = 3 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The participant that sends this message.
-  string participant = 4 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The role of the participant.
-  Participant.Role participant_role = 5 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The time when the message was created in Contact Center AI.
-  google.protobuf.Timestamp create_time = 6 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Optional. The time when the message was sent.
-  google.protobuf.Timestamp send_time = 9 [(google.api.field_behavior) = OPTIONAL];
-
-  // Output only. The annotation for the message.
-  MessageAnnotation message_annotation = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
-
-  // Output only. The sentiment analysis result for the message.
-  SentimentAnalysisResult sentiment_analysis = 8 [(google.api.field_behavior) = OUTPUT_ONLY];
-}
-
-// The request message for [Participants.CreateParticipant][google.cloud.dialogflow.v2beta1.Participants.CreateParticipant].
-message CreateParticipantRequest {
-  // Required. Resource identifier of the conversation adding the participant.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Required. The participant to create.
-  Participant participant = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [Participants.GetParticipant][google.cloud.dialogflow.v2beta1.Participants.GetParticipant].
-message GetParticipantRequest {
-  // Required. The name of the participant. Format:
-  // `projects/<Project ID>/locations/<Location ID>/conversations/<Conversation
-  // ID>/participants/<Participant ID>`.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-}
-
-// The request message for [Participants.ListParticipants][google.cloud.dialogflow.v2beta1.Participants.ListParticipants].
-message ListParticipantsRequest {
-  // Required. The conversation to list all participants from.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2 [(google.api.field_behavior) = OPTIONAL];
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Participants.ListParticipants][google.cloud.dialogflow.v2beta1.Participants.ListParticipants].
-message ListParticipantsResponse {
-  // The list of participants. There is a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated Participant participants = 1;
-
-  // Token to retrieve the next page of results or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Participants.UpdateParticipant][google.cloud.dialogflow.v2beta1.Participants.UpdateParticipant].
-message UpdateParticipantRequest {
-  // Required. The participant to update.
-  Participant participant = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Required. The mask to specify which fields to update.
-  google.protobuf.FieldMask update_mask = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// Represents the natural language speech audio to be played to the end user.
-message OutputAudio {
-  // Required. Instructs the speech synthesizer how to generate the speech
-  // audio.
-  OutputAudioConfig config = 1;
-
-  // Required. The natural language speech audio.
-  bytes audio = 2;
-}
-
-// Represents a response from an automated agent.
-message AutomatedAgentReply {
-  // Required.
-  oneof response {
-    // Response of the Dialogflow [Sessions.DetectIntent][google.cloud.dialogflow.v2beta1.Sessions.DetectIntent] call.
-    DetectIntentResponse detect_intent_response = 1;
-  }
-
-  // Response messages from the automated agent.
-  repeated ResponseMessage response_messages = 3;
-
-  // Info on the query match for the automated agent response.
-  oneof match {
-    // Name of the intent if an intent is matched for the query.
-    // For a V2 query, the value format is `projects/<Project ID>/locations/
-    // <Location ID>/agent/intents/<Intent ID>`.
-    // For a V3 query, the value format is `projects/<Project ID>/locations/
-    // <Location ID>/agents/<Agent ID>/intents/<Intent ID>`.
-    string intent = 4 [(google.api.resource_reference) = {
-                         type: "dialogflow.googleapis.com/Intent"
-                       }];
-
-    // Event name if an event is triggered for the query.
-    string event = 5;
-  }
-
-  // The collection of current Dialogflow CX agent session parameters at the
-  // time of this response.
-  google.protobuf.Struct cx_session_parameters = 6;
-}
-
-// The type of Human Agent Assistant API suggestion to perform, and the maximum
-// number of results to return for that type. Multiple `Feature` objects can
-// be specified in the `features` list.
-message SuggestionFeature {
-  // Defines the type of Human Agent Assistant feature.
-  enum Type {
-    // Unspecified feature type.
-    TYPE_UNSPECIFIED = 0;
-
-    // Run article suggestion model.
-    ARTICLE_SUGGESTION = 1;
-
-    // Run FAQ model.
-    FAQ = 2;
-
-    // Run smart reply model.
-    SMART_REPLY = 3;
-  }
-
-  // Type of Human Agent Assistant API feature to request.
-  Type type = 1;
-}
-
-// The request message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent].
-message AnalyzeContentRequest {
-  // Required. The name of the participant this text comes from.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string participant = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Required. The input content.
-  oneof input {
-    // The natural language text to be processed.
-    TextInput text_input = 6;
-
-    // An input event to send to Dialogflow.
-    EventInput event_input = 8;
-  }
-
-  // Speech synthesis configuration.
-  // The speech synthesis settings for a virtual agent that may be configured
-  // for the associated conversation profile are not used when calling
-  // AnalyzeContent. If this configuration is not supplied, speech synthesis
-  // is disabled.
-  OutputAudioConfig reply_audio_config = 5;
-
-  // Parameters for a Dialogflow virtual-agent query.
-  QueryParameters query_params = 9;
-
-  // Optional. The send time of the message from end user or human agent's
-  // perspective. It is used for identifying the same message under one
-  // participant.
-  //
-  // Given two messages under the same participant:
-  //  - If send time are different regardless of whether the content of the
-  //  messages are exactly the same, the conversation will regard them as
-  //  two distinct messages sent by the participant.
-  //  - If send time is the same regardless of whether the content of the
-  //  messages are exactly the same, the conversation will regard them as
-  //  same message, and ignore the message received later.
-  //
-  // If the value is not provided, a new request will always be regarded as a
-  // new message without any de-duplication.
-  google.protobuf.Timestamp message_send_time = 10;
-
-  // A unique identifier for this request. Restricted to 36 ASCII characters.
-  // A random UUID is recommended.
-  // This request is only idempotent if a `request_id` is provided.
-  string request_id = 11;
-}
-
-// The message in the response that indicates the parameters of DTMF.
-message DtmfParameters {
-  // Indicates whether DTMF input can be handled in the next request.
-  bool accepts_dtmf_input = 1;
-}
-
-// The response message for [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent].
-message AnalyzeContentResponse {
-  // Output only. The output text content.
-  // This field is set if the automated agent responded with text to show to
-  // the user.
-  string reply_text = 1;
-
-  // Optional. The audio data bytes encoded as specified in the request.
-  // This field is set if:
-  //
-  //  - `reply_audio_config` was specified in the request, or
-  //  - The automated agent responded with audio to play to the user. In such
-  //    case, `reply_audio.config` contains settings used to synthesize the
-  //    speech.
-  //
-  // In some scenarios, multiple output audio fields may be present in the
-  // response structure. In these cases, only the top-most-level audio output
-  // has content.
-  OutputAudio reply_audio = 2;
-
-  // Optional. Only set if a Dialogflow automated agent has responded.
-  // Note that: [AutomatedAgentReply.detect_intent_response.output_audio][]
-  // and [AutomatedAgentReply.detect_intent_response.output_audio_config][]
-  // are always empty, use [reply_audio][google.cloud.dialogflow.v2beta1.AnalyzeContentResponse.reply_audio] instead.
-  AutomatedAgentReply automated_agent_reply = 3;
-
-  // Output only. Message analyzed by CCAI.
-  Message message = 5;
-
-  // The suggestions for most recent human agent. The order is the same as
-  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
-  // [HumanAgentAssistantConfig.human_agent_suggestion_config][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.human_agent_suggestion_config].
-  repeated SuggestionResult human_agent_suggestion_results = 6;
-
-  // The suggestions for end user. The order is the same as
-  // [HumanAgentAssistantConfig.SuggestionConfig.feature_configs][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.SuggestionConfig.feature_configs] of
-  // [HumanAgentAssistantConfig.end_user_suggestion_config][google.cloud.dialogflow.v2beta1.HumanAgentAssistantConfig.end_user_suggestion_config].
-  repeated SuggestionResult end_user_suggestion_results = 7;
-
-  // Indicates the parameters of DTMF.
-  DtmfParameters dtmf_parameters = 9;
-}
-
-
-// Represents a part of a message possibly annotated with an entity. The part
-// can be an entity or purely a part of the message between two entities or
-// message start/end.
-message AnnotatedMessagePart {
-  // Required. A part of a message possibly annotated with an entity.
-  string text = 1;
-
-  // Optional. The [Dialogflow system entity
-  // type](https://cloud.google.com/dialogflow/docs/reference/system-entities)
-  // of this message part. If this is empty, Dialogflow could not annotate the
-  // phrase part with a system entity.
-  string entity_type = 2;
-
-  // Optional. The [Dialogflow system entity formatted value
-  // ](https://cloud.google.com/dialogflow/docs/reference/system-entities) of
-  // this message part. For example for a system entity of type
-  // `@sys.unit-currency`, this may contain:
-  // <pre>
-  // {
-  //   "amount": 5,
-  //   "currency": "USD"
-  // }
-  // </pre>
-  google.protobuf.Value formatted_value = 3;
-}
-
-// Represents the result of annotation for the message.
-message MessageAnnotation {
-  // Optional. The collection of annotated message parts ordered by their
-  // position in the message. You can recover the annotated message by
-  // concatenating [AnnotatedMessagePart.text].
-  repeated AnnotatedMessagePart parts = 1;
-
-  // Required. Indicates whether the text message contains entities.
-  bool contain_entities = 2;
-}
-
-// Represents article answer.
-message ArticleAnswer {
-  // The article title.
-  string title = 1;
-
-  // The article URI.
-  string uri = 2;
-
-  // Output only. Article snippets.
-  repeated string snippets = 3;
-
-  // A map that contains metadata about the answer and the
-  // document from which it originates.
-  map<string, string> metadata = 5;
-
-  // The name of answer record, in the format of
-  // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer Record
-  // ID>"
-  string answer_record = 6;
-}
-
-// Represents answer from "frequently asked questions".
-message FaqAnswer {
-  // The piece of text from the `source` knowledge base document.
-  string answer = 1;
-
-  // The system's confidence score that this Knowledge answer is a good match
-  // for this conversational query, range from 0.0 (completely uncertain)
-  // to 1.0 (completely certain).
-  float confidence = 2;
-
-  // The corresponding FAQ question.
-  string question = 3;
-
-  // Indicates which Knowledge Document this answer was extracted
-  // from.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/agent/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-  string source = 4;
-
-  // A map that contains metadata about the answer and the
-  // document from which it originates.
-  map<string, string> metadata = 5;
-
-  // The name of answer record, in the format of
-  // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer Record
-  // ID>"
-  string answer_record = 6;
-}
-
-// Represents a smart reply answer.
-message SmartReplyAnswer {
-  // The content of the reply.
-  string reply = 1;
-
-  // Smart reply confidence.
-  // The system's confidence score that this reply is a good match for
-  // this conversation, as a value from 0.0 (completely uncertain) to 1.0
-  // (completely certain).
-  float confidence = 2;
-
-  // The name of answer record, in the format of
-  // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer Record
-  // ID>"
-  string answer_record = 3;
-}
-
-// One response of different type of suggestion response which is used in
-// the response of [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent] and
-// [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent], as well as [HumanAgentAssistantEvent][google.cloud.dialogflow.v2beta1.HumanAgentAssistantEvent].
-message SuggestionResult {
-  // Different type of suggestion response.
-  oneof suggestion_response {
-    // Error status if the request failed.
-    google.rpc.Status error = 1;
-
-    // SuggestArticlesResponse if request is for ARTICLE_SUGGESTION.
-    SuggestArticlesResponse suggest_articles_response = 2;
-
-    // SuggestFaqAnswersResponse if request is for FAQ_ANSWER.
-    SuggestFaqAnswersResponse suggest_faq_answers_response = 3;
-
-    // SuggestSmartRepliesResponse if request is for SMART_REPLY.
-    SuggestSmartRepliesResponse suggest_smart_replies_response = 4;
-  }
-}
-
-// The request message for [Participants.SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles].
-message SuggestArticlesRequest {
-  // Required. The name of the participant to fetch suggestion for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Optional. The name of the latest conversation message to compile suggestion
-  // for. If empty, it will be the latest message of the conversation.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2 [
-    (google.api.field_behavior) = OPTIONAL,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Message"
-    }
-  ];
-
-  // Optional. Max number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2beta1.SuggestArticlesRequest.latest_message] to use as context
-  // when compiling the suggestion. By default 20 and at most 50.
-  int32 context_size = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The response message for [Participants.SuggestArticles][google.cloud.dialogflow.v2beta1.Participants.SuggestArticles].
-message SuggestArticlesResponse {
-  // Output only. Articles ordered by score in descending order.
-  repeated ArticleAnswer article_answers = 1;
-
-  // The name of the latest conversation message used to compile
-  // suggestion for.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2beta1.SuggestArticlesResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestArticlesResponse.context_size][google.cloud.dialogflow.v2beta1.SuggestArticlesResponse.context_size] field in the request if there
-  // aren't that many messages in the conversation.
-  int32 context_size = 3;
-}
-
-// The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers].
-message SuggestFaqAnswersRequest {
-  // Required. The name of the participant to fetch suggestion for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // Optional. The name of the latest conversation message to compile suggestion
-  // for. If empty, it will be the latest message of the conversation.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2 [
-    (google.api.field_behavior) = OPTIONAL,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Message"
-    }
-  ];
-
-  // Optional. Max number of messages prior to and including
-  // [latest_message] to use as context when compiling the
-  // suggestion. By default 20 and at most 50.
-  int32 context_size = 3 [(google.api.field_behavior) = OPTIONAL];
-}
-
-// The request message for [Participants.SuggestFaqAnswers][google.cloud.dialogflow.v2beta1.Participants.SuggestFaqAnswers].
-message SuggestFaqAnswersResponse {
-  // Output only. Answers extracted from FAQ documents.
-  repeated FaqAnswer faq_answers = 1;
-
-  // The name of the latest conversation message used to compile
-  // suggestion for.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2beta1.SuggestFaqAnswersResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestFaqAnswersRequest.context_size][google.cloud.dialogflow.v2beta1.SuggestFaqAnswersRequest.context_size] field in the request if there
-  // aren't that many messages in the conversation.
-  int32 context_size = 3;
-}
-
-// The request message for [Participants.SuggestSmartReplies][google.cloud.dialogflow.v2beta1.Participants.SuggestSmartReplies].
-message SuggestSmartRepliesRequest {
-  // Required. The name of the participant to fetch suggestion for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Participant"
-    }
-  ];
-
-  // The current natural language text segment to compile suggestion
-  // for. This provides a way for user to get follow up smart reply suggestion
-  // after a smart reply selection, without sending a text message.
-  TextInput current_text_input = 4;
-
-  // The name of the latest conversation message to compile suggestion
-  // for. If empty, it will be the latest message of the conversation.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2 [(google.api.resource_reference) = {
-                               type: "dialogflow.googleapis.com/Message"
-                             }];
-
-  // Optional. Max number of messages prior to and including
-  // [latest_message] to use as context when compiling the
-  // suggestion. By default 20 and at most 50.
-  int32 context_size = 3;
-}
-
-// The response message for [Participants.SuggestSmartReplies][google.cloud.dialogflow.v2beta1.Participants.SuggestSmartReplies].
-message SuggestSmartRepliesResponse {
-  // Output only. Multiple reply options provided by smart reply service. The
-  // order is based on the rank of the model prediction.
-  // The maximum number of the returned replies is set in SmartReplyConfig.
-  repeated SmartReplyAnswer smart_reply_answers = 1;
-
-  // The name of the latest conversation message used to compile
-  // suggestion for.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2beta1.SuggestSmartRepliesResponse.latest_message] to compile the
-  // suggestion. It may be smaller than the
-  // [SuggestSmartRepliesRequest.context_size][google.cloud.dialogflow.v2beta1.SuggestSmartRepliesRequest.context_size] field in the request if there
-  // aren't that many messages in the conversation.
-  int32 context_size = 3;
-}
-
-// Represents a suggestion for a human agent.
-message Suggestion {
-  option deprecated = true;
-
-  // Represents suggested article.
-  message Article {
-    // Output only. The article title.
-    string title = 1;
-
-    // Output only. The article URI.
-    string uri = 2;
-
-    // Output only. Article snippets.
-    repeated string snippets = 3;
-
-    // Output only. A map that contains metadata about the answer and the
-    // document from which it originates.
-    map<string, string> metadata = 5;
-
-    // Output only. The name of answer record, in the format of
-    // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer
-    // Record ID>"
-    string answer_record = 6;
-  }
-
-  // Represents suggested answer from "frequently asked questions".
-  message FaqAnswer {
-    // Output only. The piece of text from the `source` knowledge base document.
-    string answer = 1;
-
-    // The system's confidence score that this Knowledge answer is a good match
-    // for this conversational query, range from 0.0 (completely uncertain)
-    // to 1.0 (completely certain).
-    float confidence = 2;
-
-    // Output only. The corresponding FAQ question.
-    string question = 3;
-
-    // Output only. Indicates which Knowledge Document this answer was extracted
-    // from.
-    // Format: `projects/<Project ID>/locations/<Location
-    // ID>/agent/knowledgeBases/<Knowledge Base ID>/documents/<Document ID>`.
-    string source = 4;
-
-    // Output only. A map that contains metadata about the answer and the
-    // document from which it originates.
-    map<string, string> metadata = 5;
-
-    // Output only. The name of answer record, in the format of
-    // "projects/<Project ID>/locations/<Location ID>/answerRecords/<Answer
-    // Record ID>"
-    string answer_record = 6;
-  }
-
-  // Output only. The name of this suggestion.
-  // Format:
-  // `projects/<Project ID>/locations/<Location ID>/conversations/<Conversation
-  // ID>/participants/*/suggestions/<Suggestion ID>`.
-  string name = 1;
-
-  // Output only. Articles ordered by score in descending order.
-  repeated Article articles = 2;
-
-  // Output only. Answers extracted from FAQ documents.
-  repeated FaqAnswer faq_answers = 4;
-
-  // Output only. The time the suggestion was created.
-  google.protobuf.Timestamp create_time = 5;
-
-  // Output only. Latest message used as context to compile this suggestion.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 7;
-}
-
-// The request message for [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions].
-message ListSuggestionsRequest {
-  option deprecated = true;
-
-  // Required. The name of the participant to fetch suggestions for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1;
-
-  // Optional. The maximum number of items to return in a single page. The
-  // default value is 100; the maximum value is 1000.
-  int32 page_size = 2;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3;
-
-  // Optional. Filter on suggestions fields. Currently predicates on
-  // `create_time` and `create_time_epoch_microseconds` are supported.
-  // `create_time` only support milliseconds accuracy. E.g.,
-  // `create_time_epoch_microseconds > 1551790877964485` or
-  // `create_time > 2017-01-15T01:30:15.01Z`
-  //
-  // For more information about filtering, see
-  // [API Filtering](https://aip.dev/160).
-  string filter = 4;
-}
-
-// The response message for [Participants.ListSuggestions][google.cloud.dialogflow.v2beta1.Participants.ListSuggestions].
-message ListSuggestionsResponse {
-  option deprecated = true;
-
-  // Required. The list of suggestions. There will be a maximum number of items
-  // returned based on the page_size field in the request. `suggestions` is
-  // sorted by `create_time` in descending order.
-  repeated Suggestion suggestions = 1;
-
-  // Optional. Token to retrieve the next page of results or empty if there are
-  // no more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [Participants.CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion].
-message CompileSuggestionRequest {
-  option deprecated = true;
-
-  // Required. The name of the participant to fetch suggestion for.
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/participants/<Participant ID>`.
-  string parent = 1;
-
-  // Optional. The name of the latest conversation message to compile suggestion
-  // for. If empty, it will be the latest message of the conversation.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Optional. Max number of messages prior to and including
-  // [latest_message] to use as context when compiling the
-  // suggestion. If zero or less than zero, 20 is used.
-  int32 context_size = 3;
-}
-
-// The response message for [Participants.CompileSuggestion][google.cloud.dialogflow.v2beta1.Participants.CompileSuggestion].
-message CompileSuggestionResponse {
-  option deprecated = true;
-
-  // The compiled suggestion.
-  Suggestion suggestion = 1;
-
-  // The name of the latest conversation message used to compile
-  // suggestion for.
-  //
-  // Format: `projects/<Project ID>/locations/<Location
-  // ID>/conversations/<Conversation ID>/messages/<Message ID>`.
-  string latest_message = 2;
-
-  // Number of messages prior to and including
-  // [latest_message][google.cloud.dialogflow.v2beta1.CompileSuggestionResponse.latest_message]
-  // to compile the suggestion. It may be smaller than the
-  // [CompileSuggestionRequest.context_size][google.cloud.dialogflow.v2beta1.CompileSuggestionRequest.context_size] field in the request if
-  // there aren't that many messages in the conversation.
-  int32 context_size = 3;
-}
-
-// Response messages from an automated agent.
-message ResponseMessage {
-  // The text response message.
-  message Text {
-    // A collection of text responses.
-    repeated string text = 1;
-  }
-
-  // Indicates that the conversation should be handed off to a human agent.
-  //
-  // Dialogflow only uses this to determine which conversations were handed off
-  // to a human agent for measurement purposes. What else to do with this signal
-  // is up to you and your handoff procedures.
-  //
-  // You may set this, for example:
-  // * In the entry fulfillment of a CX Page if entering the page indicates
-  //   something went extremely wrong in the conversation.
-  // * In a webhook response when you determine that the customer issue can only
-  //   be handled by a human.
-  message LiveAgentHandoff {
-    // Custom metadata for your handoff procedure. Dialogflow doesn't impose
-    // any structure on this.
-    google.protobuf.Struct metadata = 1;
-  }
-
-  // Indicates that interaction with the Dialogflow agent has ended.
-  message EndInteraction {
-
-  }
-
-  // Required. The rich response message.
-  oneof message {
-    // Returns a text response.
-    Text text = 1;
-
-    // Returns a response containing a custom, platform-specific payload.
-    google.protobuf.Struct payload = 2;
-
-    // Hands off conversation to a live agent.
-    LiveAgentHandoff live_agent_handoff = 3;
-
-    // A signal that indicates the interaction with the Dialogflow agent has
-    // ended.
-    EndInteraction end_interaction = 4;
-  }
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/session.proto b/google/cloud/dialogflow_v2beta1/proto/session.proto
deleted file mode 100644
index bd53acafe..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/session.proto
+++ /dev/null
@@ -1,796 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/agent.proto";
-import "google/cloud/dialogflow/v2beta1/audio_config.proto";
-import "google/cloud/dialogflow/v2beta1/context.proto";
-import "google/cloud/dialogflow/v2beta1/gcs.proto";
-import "google/cloud/dialogflow/v2beta1/intent.proto";
-import "google/cloud/dialogflow/v2beta1/session_entity_type.proto";
-import "google/protobuf/duration.proto";
-import "google/protobuf/field_mask.proto";
-import "google/protobuf/struct.proto";
-import "google/rpc/status.proto";
-import "google/type/latlng.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "SessionProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-option (google.api.resource_definition) = {
-  type: "dialogflow.googleapis.com/Session"
-  pattern: "projects/{project}/agent/sessions/{session}"
-  pattern: "projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}"
-  pattern: "projects/{project}/locations/{location}/agent/sessions/{session}"
-};
-
-// A service used for session interactions.
-//
-// For more information, see the [API interactions
-// guide](https://cloud.google.com/dialogflow/docs/api-overview).
-service Sessions {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Processes a natural language query and returns structured, actionable data
-  // as a result. This method is not idempotent, because it may cause contexts
-  // and session entity types to be updated, which in turn might affect
-  // results of future queries.
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  rpc DetectIntent(DetectIntentRequest) returns (DetectIntentResponse) {
-    option (google.api.http) = {
-      post: "/v2beta1/{session=projects/*/agent/sessions/*}:detectIntent"
-      body: "*"
-      additional_bindings {
-        post: "/v2beta1/{session=projects/*/agent/environments/*/users/*/sessions/*}:detectIntent"
-        body: "*"
-      }
-      additional_bindings {
-        post: "/v2beta1/{session=projects/*/locations/*/agent/sessions/*}:detectIntent"
-        body: "*"
-      }
-      additional_bindings {
-        post: "/v2beta1/{session=projects/*/locations/*/agent/environments/*/users/*/sessions/*}:detectIntent"
-        body: "*"
-      }
-    };
-    option (google.api.method_signature) = "session,query_input";
-  }
-
-  // Processes a natural language query in audio format in a streaming fashion
-  // and returns structured, actionable data as a result. This method is only
-  // available via the gRPC API (not REST).
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  rpc StreamingDetectIntent(stream StreamingDetectIntentRequest) returns (stream StreamingDetectIntentResponse) {
-  }
-}
-
-// The request to detect user's intent.
-message DetectIntentRequest {
-  // Required. The name of the session this query is sent to. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment
-  // (`Environment ID` might be referred to as environment name at some places).
-  // If `User ID` is not specified, we are using "-". It's up to the API caller
-  // to choose an appropriate `Session ID` and `User Id`. They can be a random
-  // number or some type of user and session identifiers (preferably hashed).
-  // The length of the `Session ID` and `User ID` must not exceed 36 characters.
-  // For more information, see the [API interactions
-  // guide](https://cloud.google.com/dialogflow/docs/api-overview).
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  string session = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Session"
-    }
-  ];
-
-  // The parameters of this query.
-  QueryParameters query_params = 2;
-
-  // Required. The input specification. It can be set to:
-  //
-  // 1.  an audio config
-  //     which instructs the speech recognizer how to process the speech audio,
-  //
-  // 2.  a conversational query in the form of text, or
-  //
-  // 3.  an event that specifies which intent to trigger.
-  QueryInput query_input = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // Instructs the speech synthesizer how to generate the output
-  // audio. If this field is not set and agent-level speech synthesizer is not
-  // configured, no output audio is generated.
-  OutputAudioConfig output_audio_config = 4;
-
-  // Mask for [output_audio_config][google.cloud.dialogflow.v2beta1.DetectIntentRequest.output_audio_config] indicating which settings in this
-  // request-level config should override speech synthesizer settings defined at
-  // agent-level.
-  //
-  // If unspecified or empty, [output_audio_config][google.cloud.dialogflow.v2beta1.DetectIntentRequest.output_audio_config] replaces the agent-level
-  // config in its entirety.
-  google.protobuf.FieldMask output_audio_config_mask = 7;
-
-  // The natural language speech audio to be processed. This field
-  // should be populated iff `query_input` is set to an input audio config.
-  // A single request can contain up to 1 minute of speech audio data.
-  bytes input_audio = 5;
-}
-
-// The message returned from the DetectIntent method.
-message DetectIntentResponse {
-  // The unique identifier of the response. It can be used to
-  // locate a response in the training example set or for reporting issues.
-  string response_id = 1;
-
-  // The selected results of the conversational query or event processing.
-  // See `alternative_query_results` for additional potential results.
-  QueryResult query_result = 2;
-
-  // If Knowledge Connectors are enabled, there could be more than one result
-  // returned for a given query or event, and this field will contain all
-  // results except for the top one, which is captured in query_result. The
-  // alternative results are ordered by decreasing
-  // `QueryResult.intent_detection_confidence`. If Knowledge Connectors are
-  // disabled, this field will be empty until multiple responses for regular
-  // intents are supported, at which point those additional results will be
-  // surfaced here.
-  repeated QueryResult alternative_query_results = 5;
-
-  // Specifies the status of the webhook request.
-  google.rpc.Status webhook_status = 3;
-
-  // The audio data bytes encoded as specified in the request.
-  // Note: The output audio is generated based on the values of default platform
-  // text responses found in the `query_result.fulfillment_messages` field. If
-  // multiple default text responses exist, they will be concatenated when
-  // generating audio. If no default platform text responses exist, the
-  // generated audio content will be empty.
-  //
-  // In some scenarios, multiple output audio fields may be present in the
-  // response structure. In these cases, only the top-most-level audio output
-  // has content.
-  bytes output_audio = 4;
-
-  // The config used by the speech synthesizer to generate the output audio.
-  OutputAudioConfig output_audio_config = 6;
-}
-
-// Represents the parameters of the conversational query.
-message QueryParameters {
-  // The time zone of this conversational query from the
-  // [time zone database](https://www.iana.org/time-zones), e.g.,
-  // America/New_York, Europe/Paris. If not provided, the time zone specified in
-  // agent settings is used.
-  string time_zone = 1;
-
-  // The geo location of this conversational query.
-  google.type.LatLng geo_location = 2;
-
-  // The collection of contexts to be activated before this query is
-  // executed.
-  repeated Context contexts = 3;
-
-  // Specifies whether to delete all contexts in the current session
-  // before the new ones are activated.
-  bool reset_contexts = 4;
-
-  // Additional session entity types to replace or extend developer
-  // entity types with. The entity synonyms apply to all languages and persist
-  // for the session of this query.
-  repeated SessionEntityType session_entity_types = 5;
-
-  // This field can be used to pass custom data to your webhook.
-  // Arbitrary JSON objects are supported.
-  // If supplied, the value is used to populate the
-  // `WebhookRequest.original_detect_intent_request.payload`
-  // field sent to your webhook.
-  google.protobuf.Struct payload = 6;
-
-  // KnowledgeBases to get alternative results from. If not set, the
-  // KnowledgeBases enabled in the agent (through UI) will be used.
-  // Format:  `projects/<Project ID>/knowledgeBases/<Knowledge Base ID>`.
-  repeated string knowledge_base_names = 12;
-
-  // Configures the type of sentiment analysis to perform. If not
-  // provided, sentiment analysis is not performed.
-  // Note: Sentiment Analysis is only currently available for Essentials Edition
-  // agents.
-  SentimentAnalysisRequestConfig sentiment_analysis_request_config = 10;
-
-  // For mega agent query, directly specify which sub agents to query.
-  // If any specified sub agent is not linked to the mega agent, an error will
-  // be returned. If empty, Dialogflow will decide which sub agents to query.
-  // If specified for a non-mega-agent query, will be silently ignored.
-  repeated SubAgent sub_agents = 13;
-
-  // This field can be used to pass HTTP headers for a webhook
-  // call. These headers will be sent to webhook along with the headers that
-  // have been configured through Dialogflow web console. The headers defined
-  // within this field will overwrite the headers configured through Dialogflow
-  // console if there is a conflict. Header names are case-insensitive.
-  // Google's specified headers are not allowed. Including: "Host",
-  // "Content-Length", "Connection", "From", "User-Agent", "Accept-Encoding",
-  // "If-Modified-Since", "If-None-Match", "X-Forwarded-For", etc.
-  map<string, string> webhook_headers = 14;
-}
-
-// Represents the query input. It can contain either:
-//
-// 1.  An audio config which
-//     instructs the speech recognizer how to process the speech audio.
-//
-// 2.  A conversational query in the form of text.
-//
-// 3.  An event that specifies which intent to trigger.
-message QueryInput {
-  // Required. The input specification.
-  oneof input {
-    // Instructs the speech recognizer how to process the speech audio.
-    InputAudioConfig audio_config = 1;
-
-    // The natural language text to be processed.
-    TextInput text = 2;
-
-    // The event to be processed.
-    EventInput event = 3;
-
-    // The DTMF digits used to invoke intent and fill in parameter value.
-    TelephonyDtmfEvents dtmf = 4;
-  }
-}
-
-// Represents the result of conversational query or event processing.
-message QueryResult {
-  // The original conversational query text:
-  //
-  // - If natural language text was provided as input, `query_text` contains
-  //   a copy of the input.
-  // - If natural language speech audio was provided as input, `query_text`
-  //   contains the speech recognition result. If speech recognizer produced
-  //   multiple alternatives, a particular one is picked.
-  // - If automatic spell correction is enabled, `query_text` will contain the
-  //   corrected user input.
-  string query_text = 1;
-
-  // The language that was triggered during intent detection.
-  // See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes.
-  string language_code = 15;
-
-  // The Speech recognition confidence between 0.0 and 1.0. A higher number
-  // indicates an estimated greater likelihood that the recognized words are
-  // correct. The default of 0.0 is a sentinel value indicating that confidence
-  // was not set.
-  //
-  // This field is not guaranteed to be accurate or set. In particular this
-  // field isn't set for StreamingDetectIntent since the streaming endpoint has
-  // separate confidence estimates per portion of the audio in
-  // StreamingRecognitionResult.
-  float speech_recognition_confidence = 2;
-
-  // The action name from the matched intent.
-  string action = 3;
-
-  // The collection of extracted parameters.
-  //
-  // Depending on your protocol or client library language, this is a
-  // map, associative array, symbol table, dictionary, or JSON object
-  // composed of a collection of (MapKey, MapValue) pairs:
-  //
-  // -   MapKey type: string
-  // -   MapKey value: parameter name
-  // -   MapValue type:
-  //     -   If parameter's entity type is a composite entity: map
-  //     -   Else: depending on parameter value type, could be one of string,
-  //         number, boolean, null, list or map
-  // -   MapValue value:
-  //     -   If parameter's entity type is a composite entity:
-  //         map from composite entity property names to property values
-  //     -   Else: parameter value
-  google.protobuf.Struct parameters = 4;
-
-  // This field is set to:
-  //
-  // - `false` if the matched intent has required parameters and not all of
-  //    the required parameter values have been collected.
-  // - `true` if all required parameter values have been collected, or if the
-  //    matched intent doesn't contain any required parameters.
-  bool all_required_params_present = 5;
-
-  // The text to be pronounced to the user or shown on the screen.
-  // Note: This is a legacy field, `fulfillment_messages` should be preferred.
-  string fulfillment_text = 6;
-
-  // The collection of rich messages to present to the user.
-  repeated Intent.Message fulfillment_messages = 7;
-
-  // If the query was fulfilled by a webhook call, this field is set to the
-  // value of the `source` field returned in the webhook response.
-  string webhook_source = 8;
-
-  // If the query was fulfilled by a webhook call, this field is set to the
-  // value of the `payload` field returned in the webhook response.
-  google.protobuf.Struct webhook_payload = 9;
-
-  // The collection of output contexts. If applicable,
-  // `output_contexts.parameters` contains entries with name
-  // `<parameter name>.original` containing the original parameter values
-  // before the query.
-  repeated Context output_contexts = 10;
-
-  // The intent that matched the conversational query. Some, not
-  // all fields are filled in this message, including but not limited to:
-  // `name`, `display_name`, `end_interaction` and `is_fallback`.
-  Intent intent = 11;
-
-  // The intent detection confidence. Values range from 0.0
-  // (completely uncertain) to 1.0 (completely certain).
-  // This value is for informational purpose only and is only used to
-  // help match the best intent within the classification threshold.
-  // This value may change for the same end-user expression at any time due to a
-  // model retraining or change in implementation.
-  // If there are `multiple knowledge_answers` messages, this value is set to
-  // the greatest `knowledgeAnswers.match_confidence` value in the list.
-  float intent_detection_confidence = 12;
-
-  // Free-form diagnostic information for the associated detect intent request.
-  // The fields of this data can change without notice, so you should not write
-  // code that depends on its structure.
-  // The data may contain:
-  //
-  // - webhook call latency
-  // - webhook errors
-  google.protobuf.Struct diagnostic_info = 14;
-
-  // The sentiment analysis result, which depends on the
-  // `sentiment_analysis_request_config` specified in the request.
-  SentimentAnalysisResult sentiment_analysis_result = 17;
-
-  // The result from Knowledge Connector (if any), ordered by decreasing
-  // `KnowledgeAnswers.match_confidence`.
-  KnowledgeAnswers knowledge_answers = 18;
-}
-
-// Represents the result of querying a Knowledge base.
-message KnowledgeAnswers {
-  // An answer from Knowledge Connector.
-  message Answer {
-    // Represents the system's confidence that this knowledge answer is a good
-    // match for this conversational query.
-    enum MatchConfidenceLevel {
-      // Not specified.
-      MATCH_CONFIDENCE_LEVEL_UNSPECIFIED = 0;
-
-      // Indicates that the confidence is low.
-      LOW = 1;
-
-      // Indicates our confidence is medium.
-      MEDIUM = 2;
-
-      // Indicates our confidence is high.
-      HIGH = 3;
-    }
-
-    // Indicates which Knowledge Document this answer was extracted from.
-    // Format: `projects/<Project ID>/knowledgeBases/<Knowledge Base
-    // ID>/documents/<Document ID>`.
-    string source = 1 [(google.api.resource_reference) = {
-                         type: "dialogflow.googleapis.com/Document"
-                       }];
-
-    // The corresponding FAQ question if the answer was extracted from a FAQ
-    // Document, empty otherwise.
-    string faq_question = 2;
-
-    // The piece of text from the `source` knowledge base document that answers
-    // this conversational query.
-    string answer = 3;
-
-    // The system's confidence level that this knowledge answer is a good match
-    // for this conversational query.
-    // NOTE: The confidence level for a given `<query, answer>` pair may change
-    // without notice, as it depends on models that are constantly being
-    // improved. However, it will change less frequently than the confidence
-    // score below, and should be preferred for referencing the quality of an
-    // answer.
-    MatchConfidenceLevel match_confidence_level = 4;
-
-    // The system's confidence score that this Knowledge answer is a good match
-    // for this conversational query.
-    // The range is from 0.0 (completely uncertain) to 1.0 (completely certain).
-    // Note: The confidence score is likely to vary somewhat (possibly even for
-    // identical requests), as the underlying model is under constant
-    // improvement. It may be deprecated in the future. We recommend using
-    // `match_confidence_level` which should be generally more stable.
-    float match_confidence = 5;
-  }
-
-  // A list of answers from Knowledge Connector.
-  repeated Answer answers = 1;
-}
-
-// The top-level message sent by the client to the
-// [Sessions.StreamingDetectIntent][google.cloud.dialogflow.v2beta1.Sessions.StreamingDetectIntent] method.
-//
-// Multiple request messages should be sent in order:
-//
-// 1.  The first message must contain
-// [session][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.session],
-//     [query_input][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.query_input] plus optionally
-//     [query_params][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.query_params]. If the client
-//     wants to receive an audio response, it should also contain
-//     [output_audio_config][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.output_audio_config].
-//     The message must not contain
-//     [input_audio][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.input_audio].
-// 2.  If [query_input][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.query_input] was set to
-//     [query_input.audio_config][google.cloud.dialogflow.v2beta1.InputAudioConfig], all subsequent
-//     messages must contain
-//     [input_audio][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.input_audio] to continue with
-//     Speech recognition.
-//     If you decide to rather detect an intent from text input after you
-//     already started Speech recognition, please send a message with
-//     [query_input.text][google.cloud.dialogflow.v2beta1.QueryInput.text].
-//
-//     However, note that:
-//
-//     * Dialogflow will bill you for the audio duration so far.
-//     * Dialogflow discards all Speech recognition results in favor of the
-//       input text.
-//     * Dialogflow will use the language code from the first message.
-//
-// After you sent all input, you must half-close or abort the request stream.
-message StreamingDetectIntentRequest {
-  // Required. The name of the session the query is sent to.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we are using "-". It's up to the API caller
-  // to choose an appropriate `Session ID` and `User Id`. They can be a random
-  // number or some type of user and session identifiers (preferably hashed).
-  // The length of the `Session ID` and `User ID` must not exceed 36 characters.
-  //
-  // For more information, see the [API interactions
-  // guide](https://cloud.google.com/dialogflow/docs/api-overview).
-  //
-  // Note: Always use agent versions for production traffic.
-  // See [Versions and
-  // environments](https://cloud.google.com/dialogflow/es/docs/agents-versions).
-  string session = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/Session"
-    }
-  ];
-
-  // The parameters of this query.
-  QueryParameters query_params = 2;
-
-  // Required. The input specification. It can be set to:
-  //
-  // 1.  an audio config which instructs the speech recognizer how to process
-  //     the speech audio,
-  //
-  // 2.  a conversational query in the form of text, or
-  //
-  // 3.  an event that specifies which intent to trigger.
-  QueryInput query_input = 3 [(google.api.field_behavior) = REQUIRED];
-
-  // DEPRECATED. Please use [InputAudioConfig.single_utterance][google.cloud.dialogflow.v2beta1.InputAudioConfig.single_utterance] instead.
-  // If `false` (default), recognition does not cease until the
-  // client closes the stream.
-  // If `true`, the recognizer will detect a single spoken utterance in input
-  // audio. Recognition ceases when it detects the audio's voice has
-  // stopped or paused. In this case, once a detected intent is received, the
-  // client should close the stream and start a new request with a new stream as
-  // needed.
-  // This setting is ignored when `query_input` is a piece of text or an event.
-  bool single_utterance = 4 [deprecated = true];
-
-  // Instructs the speech synthesizer how to generate the output
-  // audio. If this field is not set and agent-level speech synthesizer is not
-  // configured, no output audio is generated.
-  OutputAudioConfig output_audio_config = 5;
-
-  // Mask for [output_audio_config][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.output_audio_config] indicating which settings in this
-  // request-level config should override speech synthesizer settings defined at
-  // agent-level.
-  //
-  // If unspecified or empty, [output_audio_config][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.output_audio_config] replaces the agent-level
-  // config in its entirety.
-  google.protobuf.FieldMask output_audio_config_mask = 7;
-
-  // The input audio content to be recognized. Must be sent if
-  // `query_input` was set to a streaming input audio config. The complete audio
-  // over all streaming messages must not exceed 1 minute.
-  bytes input_audio = 6;
-}
-
-// The top-level message returned from the
-// `StreamingDetectIntent` method.
-//
-// Multiple response messages can be returned in order:
-//
-// 1.  If the input was set to streaming audio, the first one or more messages
-//     contain `recognition_result`. Each `recognition_result` represents a more
-//     complete transcript of what the user said. The last `recognition_result`
-//     has `is_final` set to `true`.
-//
-// 2.  The next message contains `response_id`, `query_result`,
-//     `alternative_query_results` and optionally `webhook_status` if a WebHook
-//     was called.
-//
-// 3.  If `output_audio_config` was specified in the request or agent-level
-//     speech synthesizer is configured, all subsequent messages contain
-//     `output_audio` and `output_audio_config`.
-message StreamingDetectIntentResponse {
-  // The unique identifier of the response. It can be used to
-  // locate a response in the training example set or for reporting issues.
-  string response_id = 1;
-
-  // The result of speech recognition.
-  StreamingRecognitionResult recognition_result = 2;
-
-  // The selected results of the conversational query or event processing.
-  // See `alternative_query_results` for additional potential results.
-  QueryResult query_result = 3;
-
-  // If Knowledge Connectors are enabled, there could be more than one result
-  // returned for a given query or event, and this field will contain all
-  // results except for the top one, which is captured in query_result. The
-  // alternative results are ordered by decreasing
-  // `QueryResult.intent_detection_confidence`. If Knowledge Connectors are
-  // disabled, this field will be empty until multiple responses for regular
-  // intents are supported, at which point those additional results will be
-  // surfaced here.
-  repeated QueryResult alternative_query_results = 7;
-
-  // Specifies the status of the webhook request.
-  google.rpc.Status webhook_status = 4;
-
-  // The audio data bytes encoded as specified in the request.
-  // Note: The output audio is generated based on the values of default platform
-  // text responses found in the `query_result.fulfillment_messages` field. If
-  // multiple default text responses exist, they will be concatenated when
-  // generating audio. If no default platform text responses exist, the
-  // generated audio content will be empty.
-  //
-  // In some scenarios, multiple output audio fields may be present in the
-  // response structure. In these cases, only the top-most-level audio output
-  // has content.
-  bytes output_audio = 5;
-
-  // The config used by the speech synthesizer to generate the output audio.
-  OutputAudioConfig output_audio_config = 6;
-}
-
-// Contains a speech recognition result corresponding to a portion of the audio
-// that is currently being processed or an indication that this is the end
-// of the single requested utterance.
-//
-// Example:
-//
-// 1.  transcript: "tube"
-//
-// 2.  transcript: "to be a"
-//
-// 3.  transcript: "to be"
-//
-// 4.  transcript: "to be or not to be"
-//     is_final: true
-//
-// 5.  transcript: " that's"
-//
-// 6.  transcript: " that is"
-//
-// 7.  message_type: `END_OF_SINGLE_UTTERANCE`
-//
-// 8.  transcript: " that is the question"
-//     is_final: true
-//
-// Only two of the responses contain final results (#4 and #8 indicated by
-// `is_final: true`). Concatenating these generates the full transcript: "to be
-// or not to be that is the question".
-//
-// In each response we populate:
-//
-// *  for `TRANSCRIPT`: `transcript` and possibly `is_final`.
-//
-// *  for `END_OF_SINGLE_UTTERANCE`: only `message_type`.
-message StreamingRecognitionResult {
-  // Type of the response message.
-  enum MessageType {
-    // Not specified. Should never be used.
-    MESSAGE_TYPE_UNSPECIFIED = 0;
-
-    // Message contains a (possibly partial) transcript.
-    TRANSCRIPT = 1;
-
-    // Event indicates that the server has detected the end of the user's speech
-    // utterance and expects no additional speech. Therefore, the server will
-    // not process additional audio (although it may subsequently return
-    // additional results). The client should stop sending additional audio
-    // data, half-close the gRPC connection, and wait for any additional results
-    // until the server closes the gRPC connection. This message is only sent if
-    // `single_utterance` was set to `true`, and is not used otherwise.
-    END_OF_SINGLE_UTTERANCE = 2;
-  }
-
-  // Type of the result message.
-  MessageType message_type = 1;
-
-  // Transcript text representing the words that the user spoke.
-  // Populated if and only if `message_type` = `TRANSCRIPT`.
-  string transcript = 2;
-
-  // If `false`, the `StreamingRecognitionResult` represents an
-  // interim result that may change. If `true`, the recognizer will not return
-  // any further hypotheses about this piece of the audio. May only be populated
-  // for `message_type` = `TRANSCRIPT`.
-  bool is_final = 3;
-
-  // The Speech confidence between 0.0 and 1.0 for the current portion of audio.
-  // A higher number indicates an estimated greater likelihood that the
-  // recognized words are correct. The default of 0.0 is a sentinel value
-  // indicating that confidence was not set.
-  //
-  // This field is typically only provided if `is_final` is true and you should
-  // not rely on it being accurate or even set.
-  float confidence = 4;
-
-  // An estimate of the likelihood that the speech recognizer will
-  // not change its guess about this interim recognition result:
-  //
-  // * If the value is unspecified or 0.0, Dialogflow didn't compute the
-  //   stability. In particular, Dialogflow will only provide stability for
-  //   `TRANSCRIPT` results with `is_final = false`.
-  // * Otherwise, the value is in (0.0, 1.0] where 0.0 means completely
-  //   unstable and 1.0 means completely stable.
-  float stability = 6;
-
-  // Word-specific information for the words recognized by Speech in
-  // [transcript][google.cloud.dialogflow.v2beta1.StreamingRecognitionResult.transcript]. Populated if and only if `message_type` = `TRANSCRIPT` and
-  // [InputAudioConfig.enable_word_info] is set.
-  repeated SpeechWordInfo speech_word_info = 7;
-
-  // Time offset of the end of this Speech recognition result relative to the
-  // beginning of the audio. Only populated for `message_type` = `TRANSCRIPT`.
-  google.protobuf.Duration speech_end_offset = 8;
-
-  // DTMF digits. Populated if and only if `message_type` = `DTMF_DIGITS`.
-  TelephonyDtmfEvents dtmf_digits = 5;
-}
-
-// Represents the natural language text to be processed.
-message TextInput {
-  // Required. The UTF-8 encoded natural language text to be processed.
-  // Text length must not exceed 256 characters.
-  string text = 1;
-
-  // Required. The language of this conversational query. See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. Note that queries in
-  // the same session do not necessarily need to specify the same language.
-  string language_code = 2;
-}
-
-// Events allow for matching intents by event name instead of the natural
-// language input. For instance, input `<event: { name: "welcome_event",
-// parameters: { name: "Sam" } }>` can trigger a personalized welcome response.
-// The parameter `name` may be used by the agent in the response:
-// `"Hello #welcome_event.name! What can I do for you today?"`.
-message EventInput {
-  // Required. The unique identifier of the event.
-  string name = 1;
-
-  // The collection of parameters associated with the event.
-  //
-  // Depending on your protocol or client library language, this is a
-  // map, associative array, symbol table, dictionary, or JSON object
-  // composed of a collection of (MapKey, MapValue) pairs:
-  //
-  // -   MapKey type: string
-  // -   MapKey value: parameter name
-  // -   MapValue type:
-  //     -   If parameter's entity type is a composite entity: map
-  //     -   Else: depending on parameter value type, could be one of string,
-  //         number, boolean, null, list or map
-  // -   MapValue value:
-  //     -   If parameter's entity type is a composite entity:
-  //         map from composite entity property names to property values
-  //     -   Else: parameter value
-  google.protobuf.Struct parameters = 2;
-
-  // Required. The language of this query. See [Language
-  // Support](https://cloud.google.com/dialogflow/docs/reference/language)
-  // for a list of the currently supported language codes. Note that queries in
-  // the same session do not necessarily need to specify the same language.
-  string language_code = 3;
-}
-
-// Configures the types of sentiment analysis to perform.
-message SentimentAnalysisRequestConfig {
-  // Instructs the service to perform sentiment analysis on
-  // `query_text`. If not provided, sentiment analysis is not performed on
-  // `query_text`.
-  bool analyze_query_text_sentiment = 1;
-}
-
-// The result of sentiment analysis. Sentiment analysis inspects user input
-// and identifies the prevailing subjective opinion, especially to determine a
-// user's attitude as positive, negative, or neutral.
-// For [Participants.DetectIntent][], it needs to be configured in
-// [DetectIntentRequest.query_params][google.cloud.dialogflow.v2beta1.DetectIntentRequest.query_params]. For
-// [Participants.StreamingDetectIntent][], it needs to be configured in
-// [StreamingDetectIntentRequest.query_params][google.cloud.dialogflow.v2beta1.StreamingDetectIntentRequest.query_params].
-// And for [Participants.AnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.AnalyzeContent] and
-// [Participants.StreamingAnalyzeContent][google.cloud.dialogflow.v2beta1.Participants.StreamingAnalyzeContent], it needs to be configured in
-// [ConversationProfile.human_agent_assistant_config][google.cloud.dialogflow.v2beta1.ConversationProfile.human_agent_assistant_config]
-message SentimentAnalysisResult {
-  // The sentiment analysis result for `query_text`.
-  Sentiment query_text_sentiment = 1;
-}
-
-// The sentiment, such as positive/negative feeling or association, for a unit
-// of analysis, such as the query text.
-message Sentiment {
-  // Sentiment score between -1.0 (negative sentiment) and 1.0 (positive
-  // sentiment).
-  float score = 1;
-
-  // A non-negative number in the [0, +inf) range, which represents the absolute
-  // magnitude of sentiment, regardless of score (positive or negative).
-  float magnitude = 2;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/session_entity_type.proto b/google/cloud/dialogflow_v2beta1/proto/session_entity_type.proto
deleted file mode 100644
index c692a6b94..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/session_entity_type.proto
+++ /dev/null
@@ -1,350 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-import "google/api/client.proto";
-import "google/api/field_behavior.proto";
-import "google/api/resource.proto";
-import "google/cloud/dialogflow/v2beta1/entity_type.proto";
-import "google/protobuf/empty.proto";
-import "google/protobuf/field_mask.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "SessionEntityTypeProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Service for managing [SessionEntityTypes][google.cloud.dialogflow.v2beta1.SessionEntityType].
-service SessionEntityTypes {
-  option (google.api.default_host) = "dialogflow.googleapis.com";
-  option (google.api.oauth_scopes) =
-      "https://www.googleapis.com/auth/cloud-platform,"
-      "https://www.googleapis.com/auth/dialogflow";
-
-  // Returns the list of all session entity types in the specified session.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc ListSessionEntityTypes(ListSessionEntityTypesRequest) returns (ListSessionEntityTypesResponse) {
-    option (google.api.http) = {
-      get: "/v2beta1/{parent=projects/*/agent/sessions/*}/entityTypes"
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent/sessions/*}/entityTypes"
-      }
-      additional_bindings {
-        get: "/v2beta1/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-      }
-    };
-    option (google.api.method_signature) = "parent";
-  }
-
-  // Retrieves the specified session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc GetSessionEntityType(GetSessionEntityTypeRequest) returns (SessionEntityType) {
-    option (google.api.http) = {
-      get: "/v2beta1/{name=projects/*/agent/sessions/*/entityTypes/*}"
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/agent/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        get: "/v2beta1/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-
-  // Creates a session entity type.
-  //
-  // If the specified session entity type already exists, overrides the
-  // session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc CreateSessionEntityType(CreateSessionEntityTypeRequest) returns (SessionEntityType) {
-    option (google.api.http) = {
-      post: "/v2beta1/{parent=projects/*/agent/sessions/*}/entityTypes"
-      body: "session_entity_type"
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/sessions/*}/entityTypes"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        post: "/v2beta1/{parent=projects/*/locations/*/agent/environments/*/users/*/sessions/*}/entityTypes"
-        body: "session_entity_type"
-      }
-    };
-    option (google.api.method_signature) = "parent,session_entity_type";
-  }
-
-  // Updates the specified session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc UpdateSessionEntityType(UpdateSessionEntityTypeRequest) returns (SessionEntityType) {
-    option (google.api.http) = {
-      patch: "/v2beta1/{session_entity_type.name=projects/*/agent/sessions/*/entityTypes/*}"
-      body: "session_entity_type"
-      additional_bindings {
-        patch: "/v2beta1/{session_entity_type.name=projects/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        patch: "/v2beta1/{session_entity_type.name=projects/*/locations/*/agent/sessions/*/entityTypes/*}"
-        body: "session_entity_type"
-      }
-      additional_bindings {
-        patch: "/v2beta1/{session_entity_type.name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-        body: "session_entity_type"
-      }
-    };
-    option (google.api.method_signature) = "session_entity_type";
-    option (google.api.method_signature) = "session_entity_type,update_mask";
-  }
-
-  // Deletes the specified session entity type.
-  //
-  // This method doesn't work with Google Assistant integration.
-  // Contact Dialogflow support if you need to use session entities
-  // with Google Assistant integration.
-  rpc DeleteSessionEntityType(DeleteSessionEntityTypeRequest) returns (google.protobuf.Empty) {
-    option (google.api.http) = {
-      delete: "/v2beta1/{name=projects/*/agent/sessions/*/entityTypes/*}"
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/agent/sessions/*/entityTypes/*}"
-      }
-      additional_bindings {
-        delete: "/v2beta1/{name=projects/*/locations/*/agent/environments/*/users/*/sessions/*/entityTypes/*}"
-      }
-    };
-    option (google.api.method_signature) = "name";
-  }
-}
-
-// A session represents a conversation between a Dialogflow agent and an
-// end-user. You can create special entities, called session entities, during a
-// session. Session entities can extend or replace custom entity types and only
-// exist during the session that they were created for. All session data,
-// including session entities, is stored by Dialogflow for 20 minutes.
-//
-// For more information, see the [session entity
-// guide](https://cloud.google.com/dialogflow/docs/entities-session).
-message SessionEntityType {
-  option (google.api.resource) = {
-    type: "dialogflow.googleapis.com/SessionEntityType"
-    pattern: "projects/{project}/agent/sessions/{session}/entityTypes/{entity_type}"
-    pattern: "projects/{project}/locations/{location}/agent/sessions/{session}/entityTypes/{entity_type}"
-    pattern: "projects/{project}/agent/environments/{environment}/users/{user}/sessions/{session}/entityTypes/{entity_type}"
-  };
-
-  // The types of modifications for a session entity type.
-  enum EntityOverrideMode {
-    // Not specified. This value should be never used.
-    ENTITY_OVERRIDE_MODE_UNSPECIFIED = 0;
-
-    // The collection of session entities overrides the collection of entities
-    // in the corresponding custom entity type.
-    ENTITY_OVERRIDE_MODE_OVERRIDE = 1;
-
-    // The collection of session entities extends the collection of entities in
-    // the corresponding custom entity type.
-    //
-    // Note: Even in this override mode calls to `ListSessionEntityTypes`,
-    // `GetSessionEntityType`, `CreateSessionEntityType` and
-    // `UpdateSessionEntityType` only return the additional entities added in
-    // this session entity type. If you want to get the supplemented list,
-    // please call [EntityTypes.GetEntityType][google.cloud.dialogflow.v2beta1.EntityTypes.GetEntityType] on the custom entity type
-    // and merge.
-    ENTITY_OVERRIDE_MODE_SUPPLEMENT = 2;
-  }
-
-  // Required. The unique identifier of this session entity type. Supported
-  // formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity
-  //   Type Display Name>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>/entityTypes/<Entity Type Display Name>`
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/environments/
-  //   <Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>/entityTypes/<Entity Type Display Name>`
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  // `<Entity Type Display Name>` must be the display name of an existing entity
-  // type in the same agent that will be overridden or supplemented.
-  string name = 1;
-
-  // Required. Indicates whether the additional data should override or
-  // supplement the custom entity type definition.
-  EntityOverrideMode entity_override_mode = 2;
-
-  // Required. The collection of entities associated with this session entity
-  // type.
-  repeated EntityType.Entity entities = 3;
-}
-
-// The request message for [SessionEntityTypes.ListSessionEntityTypes][google.cloud.dialogflow.v2beta1.SessionEntityTypes.ListSessionEntityTypes].
-message ListSessionEntityTypesRequest {
-  // Required. The session to list all session entity types from.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-
-  // Optional. The maximum number of items to return in a single page. By
-  // default 100 and at most 1000.
-  int32 page_size = 2;
-
-  // Optional. The next_page_token value returned from a previous list request.
-  string page_token = 3;
-}
-
-// The response message for [SessionEntityTypes.ListSessionEntityTypes][google.cloud.dialogflow.v2beta1.SessionEntityTypes.ListSessionEntityTypes].
-message ListSessionEntityTypesResponse {
-  // The list of session entity types. There will be a maximum number of items
-  // returned based on the page_size field in the request.
-  repeated SessionEntityType session_entity_types = 1;
-
-  // Token to retrieve the next page of results, or empty if there are no
-  // more results in the list.
-  string next_page_token = 2;
-}
-
-// The request message for [SessionEntityTypes.GetSessionEntityType][google.cloud.dialogflow.v2beta1.SessionEntityTypes.GetSessionEntityType].
-message GetSessionEntityTypeRequest {
-  // Required. The name of the session entity type. Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity
-  //   Type Display Name>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>/entityTypes/<Entity Type Display Name>`
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/environments/
-  //   <Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>/entityTypes/<Entity Type Display Name>`
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-}
-
-// The request message for [SessionEntityTypes.CreateSessionEntityType][google.cloud.dialogflow.v2beta1.SessionEntityTypes.CreateSessionEntityType].
-message CreateSessionEntityTypeRequest {
-  // Required. The session to create a session entity type for.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string parent = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      child_type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-
-  // Required. The session entity type to create.
-  SessionEntityType session_entity_type = 2 [(google.api.field_behavior) = REQUIRED];
-}
-
-// The request message for [SessionEntityTypes.UpdateSessionEntityType][google.cloud.dialogflow.v2beta1.SessionEntityTypes.UpdateSessionEntityType].
-message UpdateSessionEntityTypeRequest {
-  // Required. The session entity type to update.
-  SessionEntityType session_entity_type = 1 [(google.api.field_behavior) = REQUIRED];
-
-  // Optional. The mask to control which fields get updated.
-  google.protobuf.FieldMask update_mask = 2;
-}
-
-// The request message for [SessionEntityTypes.DeleteSessionEntityType][google.cloud.dialogflow.v2beta1.SessionEntityTypes.DeleteSessionEntityType].
-message DeleteSessionEntityTypeRequest {
-  // Required. The name of the entity type to delete.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>/entityTypes/<Entity
-  //   Type Display Name>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>/entityTypes/<Entity Type Display Name>`
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>/entityTypes/<Entity Type Display Name>`
-  // - `projects/<Project ID>/locations/<Location ID>/agent/environments/
-  //   <Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>/entityTypes/<Entity Type Display Name>`
-  //
-  // If `Location ID` is not specified we assume default 'us' location. If
-  // `Environment ID` is not specified, we assume default 'draft' environment.
-  // If `User ID` is not specified, we assume default '-' user.
-  string name = 1 [
-    (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = {
-      type: "dialogflow.googleapis.com/SessionEntityType"
-    }
-  ];
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/validation_result.proto b/google/cloud/dialogflow_v2beta1/proto/validation_result.proto
deleted file mode 100644
index 82352ad08..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/validation_result.proto
+++ /dev/null
@@ -1,76 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "ValidationResultProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// Represents a single validation error.
-message ValidationError {
-  // Represents a level of severity.
-  enum Severity {
-    // Not specified. This value should never be used.
-    SEVERITY_UNSPECIFIED = 0;
-
-    // The agent doesn't follow Dialogflow best practices.
-    INFO = 1;
-
-    // The agent may not behave as expected.
-    WARNING = 2;
-
-    // The agent may experience partial failures.
-    ERROR = 3;
-
-    // The agent may completely fail.
-    CRITICAL = 4;
-  }
-
-  // The severity of the error.
-  Severity severity = 1;
-
-  // The names of the entries that the error is associated with.
-  // Format:
-  //
-  // - "projects/<Project ID>/agent", if the error is associated with the entire
-  // agent.
-  // - "projects/<Project ID>/agent/intents/<Intent ID>", if the error is
-  // associated with certain intents.
-  // - "projects/<Project
-  // ID>/agent/intents/<Intent Id>/trainingPhrases/<Training Phrase ID>", if the
-  // error is associated with certain intent training phrases.
-  // - "projects/<Project ID>/agent/intents/<Intent Id>/parameters/<Parameter
-  // ID>", if the error is associated with certain intent parameters.
-  // - "projects/<Project ID>/agent/entities/<Entity ID>", if the error is
-  // associated with certain entities.
-  repeated string entries = 3;
-
-  // The detailed error messsage.
-  string error_message = 4;
-}
-
-// Represents the output of agent validation.
-message ValidationResult {
-  // Contains all validation errors.
-  repeated ValidationError validation_errors = 1;
-}
diff --git a/google/cloud/dialogflow_v2beta1/proto/webhook.proto b/google/cloud/dialogflow_v2beta1/proto/webhook.proto
deleted file mode 100644
index 64c7efda7..000000000
--- a/google/cloud/dialogflow_v2beta1/proto/webhook.proto
+++ /dev/null
@@ -1,165 +0,0 @@
-// Copyright 2021 Google LLC
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-syntax = "proto3";
-
-package google.cloud.dialogflow.v2beta1;
-
-import "google/cloud/dialogflow/v2beta1/context.proto";
-import "google/cloud/dialogflow/v2beta1/intent.proto";
-import "google/cloud/dialogflow/v2beta1/session.proto";
-import "google/cloud/dialogflow/v2beta1/session_entity_type.proto";
-import "google/protobuf/struct.proto";
-import "google/api/annotations.proto";
-
-option cc_enable_arenas = true;
-option csharp_namespace = "Google.Cloud.Dialogflow.V2beta1";
-option go_package = "google.golang.org/genproto/googleapis/cloud/dialogflow/v2beta1;dialogflow";
-option java_multiple_files = true;
-option java_outer_classname = "WebhookProto";
-option java_package = "com.google.cloud.dialogflow.v2beta1";
-option objc_class_prefix = "DF";
-
-// The request message for a webhook call.
-message WebhookRequest {
-  // The unique identifier of detectIntent request session.
-  // Can be used to identify end-user inside webhook implementation.
-  // Supported formats:
-  // - `projects/<Project ID>/agent/sessions/<Session ID>,
-  // - `projects/<Project ID>/locations/<Location ID>/agent/sessions/<Session
-  //   ID>`,
-  // - `projects/<Project ID>/agent/environments/<Environment ID>/users/<User
-  //   ID>/sessions/<Session ID>`,
-  // - `projects/<Project ID>/locations/<Location
-  //   ID>/agent/environments/<Environment ID>/users/<User ID>/sessions/<Session
-  //   ID>`,
-  string session = 4;
-
-  // The unique identifier of the response. Contains the same value as
-  // `[Streaming]DetectIntentResponse.response_id`.
-  string response_id = 1;
-
-  // The result of the conversational query or event processing. Contains the
-  // same value as `[Streaming]DetectIntentResponse.query_result`.
-  QueryResult query_result = 2;
-
-  // Alternative query results from KnowledgeService.
-  repeated QueryResult alternative_query_results = 5;
-
-  // Optional. The contents of the original request that was passed to
-  // `[Streaming]DetectIntent` call.
-  OriginalDetectIntentRequest original_detect_intent_request = 3;
-}
-
-// The response message for a webhook call.
-//
-// This response is validated by the Dialogflow server. If validation fails,
-// an error will be returned in the [QueryResult.diagnostic_info][google.cloud.dialogflow.v2beta1.QueryResult.diagnostic_info] field.
-// Setting JSON fields to an empty value with the wrong type is a common error.
-// To avoid this error:
-//
-// - Use `""` for empty strings
-// - Use `{}` or `null` for empty objects
-// - Use `[]` or `null` for empty arrays
-//
-// For more information, see the
-// [Protocol Buffers Language
-// Guide](https://developers.google.com/protocol-buffers/docs/proto3#json).
-message WebhookResponse {
-  // Optional. The text response message intended for the end-user.
-  // It is recommended to use `fulfillment_messages.text.text[0]` instead.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.fulfillment_text][google.cloud.dialogflow.v2beta1.QueryResult.fulfillment_text] sent to the integration or API caller.
-  string fulfillment_text = 1;
-
-  // Optional. The rich response messages intended for the end-user.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.fulfillment_messages][google.cloud.dialogflow.v2beta1.QueryResult.fulfillment_messages] sent to the integration or API caller.
-  repeated Intent.Message fulfillment_messages = 2;
-
-  // Optional. A custom field used to identify the webhook source.
-  // Arbitrary strings are supported.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.webhook_source][google.cloud.dialogflow.v2beta1.QueryResult.webhook_source] sent to the integration or API caller.
-  string source = 3;
-
-  // Optional. This field can be used to pass custom data from your webhook to the
-  // integration or API caller. Arbitrary JSON objects are supported.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.webhook_payload][google.cloud.dialogflow.v2beta1.QueryResult.webhook_payload] sent to the integration or API caller.
-  // This field is also used by the
-  // [Google Assistant
-  // integration](https://cloud.google.com/dialogflow/docs/integrations/aog)
-  // for rich response messages.
-  // See the format definition at [Google Assistant Dialogflow webhook
-  // format](https://developers.google.com/assistant/actions/build/json/dialogflow-webhook-json)
-  google.protobuf.Struct payload = 4;
-
-  // Optional. The collection of output contexts that will overwrite currently
-  // active contexts for the session and reset their lifespans.
-  // When provided, Dialogflow uses this field to populate
-  // [QueryResult.output_contexts][google.cloud.dialogflow.v2beta1.QueryResult.output_contexts] sent to the integration or API caller.
-  repeated Context output_contexts = 5;
-
-  // Optional. Invokes the supplied events.
-  // When this field is set, Dialogflow ignores the `fulfillment_text`,
-  // `fulfillment_messages`, and `payload` fields.
-  EventInput followup_event_input = 6;
-
-  // Indicates that a live agent should be brought in to handle the
-  // interaction with the user. In most cases, when you set this flag to true,
-  // you would also want to set end_interaction to true as well. Default is
-  // false.
-  bool live_agent_handoff = 7;
-
-  // Optional. Indicates that this intent ends an interaction. Some integrations
-  // (e.g., Actions on Google or Dialogflow phone gateway) use this information
-  // to close interaction with an end user. Default is false.
-  bool end_interaction = 8;
-
-  // Optional. Additional session entity types to replace or extend developer
-  // entity types with. The entity synonyms apply to all languages and persist
-  // for the session. Setting this data from a webhook overwrites
-  // the session entity types that have been set using `detectIntent`,
-  // `streamingDetectIntent` or [SessionEntityType][google.cloud.dialogflow.v2beta1.SessionEntityType] management methods.
-  repeated SessionEntityType session_entity_types = 10;
-}
-
-// Represents the contents of the original request that was passed to
-// the `[Streaming]DetectIntent` call.
-message OriginalDetectIntentRequest {
-  // The source of this request, e.g., `google`, `facebook`, `slack`. It is set
-  // by Dialogflow-owned servers.
-  string source = 1;
-
-  // Optional. The version of the protocol used for this request.
-  // This field is AoG-specific.
-  string version = 2;
-
-  // Optional. This field is set to the value of the `QueryParameters.payload`
-  // field passed in the request. Some integrations that query a Dialogflow
-  // agent may provide additional information in the payload.
-  //
-  // In particular, for the Dialogflow Phone Gateway integration, this field has
-  // the form:
-  // <pre>{
-  //  "telephony": {
-  //    "caller_id": "+18558363987"
-  //  }
-  // }</pre>
-  // Note: The caller ID field (`caller_id`) will be redacted for Trial
-  // Edition agents and populated with the caller ID in [E.164
-  // format](https://en.wikipedia.org/wiki/E.164) for Essentials Edition agents.
-  google.protobuf.Struct payload = 3;
-}