fixes for agents sample (#240)

Author: vhvb1989

scenarios/projects/basic/README.md

@@ -71,7 +71,7 @@ py -3 -m venv .venv
 On Linux:
 ```
 python3 -m venv .venv
-source venv/bin/activate
+source .venv/bin/activate
 ```
 
 Install the core dependencies to run the sample:

scenarios/projects/basic/agents.py

@@ -43,6 +43,8 @@
 
 # get messages from the thread and print the response (last message)
 messages = project.agents.list_messages(thread_id=thread.id)
-print(f"Response: {messages[-1]}")
+for text_message in messages.text_messages:
+    print(text_message.as_dict())
+
 
 # </run_agent>