Align function calling examples

examples/function-calling/function-calling-openrouter.py

@@ -76,7 +76,6 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
     llm = OpenRouterLLMService(
         api_key=os.environ["OPENROUTER_API_KEY"],
         settings=OpenRouterLLMService.Settings(
-            model="openai/gpt-4o-2024-11-20",
             system_instruction="You are a helpful assistant in a voice conversation. Your responses will be spoken aloud, so avoid emojis, bullet points, or other formatting that can't be spoken. Respond to what the user said in a creative, helpful, and brief way.",
         ),
     )
@@ -136,6 +135,9 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
     async def on_client_connected(transport, client):
         logger.info(f"Client connected")
         # Kick off the conversation.
+        context.add_message(
+            {"role": "developer", "content": "Please introduce yourself to the user."}
+        )
         await task.queue_frames([LLMRunFrame()])
 
     @transport.event_handler("on_client_disconnected")