Python: Small fixes in examples (#540)

* Fixed Ruff formatting

* Added more info to chat response cancellation example

* Improved example

* Small fix

python/samples/getting_started/agents/openai_assistants_client/openai_assistants_with_file_search.py

@@ -1,11 +1,13 @@
 # Copyright (c) Microsoft. All rights reserved.
 
 import asyncio
+
 from agent_framework import ChatClientAgent, HostedFileSearchTool, HostedVectorStoreContent
 from agent_framework.openai import OpenAIAssistantsClient
 
 # Helper functions
 
+
 async def create_vector_store(client: OpenAIAssistantsClient) -> tuple[str, HostedVectorStoreContent]:
     """Create a vector store with sample documents."""
     file = await client.client.files.create(
@@ -42,12 +44,12 @@ async def main() -> None:
         print(f"User: {query}")
         print("Agent: ", end="", flush=True)
         async for chunk in agent.run_streaming(
-            query,
-            tool_resources={"file_search": {"vector_store_ids": [vector_store.vector_store_id]}}
+            query, tool_resources={"file_search": {"vector_store_ids": [vector_store.vector_store_id]}}
         ):
             if chunk.text:
                 print(chunk.text, end="", flush=True)
         await delete_vector_store(client, file_id, vector_store.vector_store_id)
 
+
 if __name__ == "__main__":
     asyncio.run(main())