Update README.md for conversation_basic

Update README.md for `conversation_basic` according to `0_python_example_template`

examples/conversation_basic/README.md

@@ -1,5 +1,6 @@
 # Multi-Agent Conversation in AgentScope
-This is a demo of how to program a multi-agent conversation in AgentScope.
+
+This example will show how to program a multi-agent conversation in AgentScope.
 Complete code is in `conversation.py`, which set up a user agent and an
 assistant agent to have a conversation. When user input "exit", the
 conversation ends.
@@ -8,5 +9,12 @@ You can modify the `sys_prompt` to change the role of assistant agent.
 # Note: Set your api_key in conversation.py first
 python conversation.py
 ```
+## Tested Models
+
+These models are tested in this example. For other models, some modifications may be needed.
+- dashscope_chat(qwen-max)
+- ollama_chat (ollama_llama3_8b)
+
+## Prerequisites
 To set up model serving with open-source LLMs, follow the guidance in
-[scripts/REAMDE.md](../../scripts/README.md).
+[scripts/REAMDE.md](../../scripts/README.md).