examples(foundational): speak "Let me check on that" in 14d examples

examples/foundational/14d-function-calling-moondream-video.py

@@ -20,6 +20,7 @@ from pipecat.frames.frames import (
     LLMFullResponseStartFrame,
     LLMRunFrame,
     TextFrame,
+    TTSSpeakFrame,
     UserImageRequestFrame,
 )
 from pipecat.pipeline.parallel_pipeline import ParallelPipeline
@@ -136,6 +137,10 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
     llm = OpenAILLMService(api_key=os.getenv("OPENAI_API_KEY"))
     llm.register_function("fetch_user_image", fetch_user_image)
 
+    @llm.event_handler("on_function_calls_started")
+    async def on_function_calls_started(service, function_calls):
+        await tts.queue_frame(TTSSpeakFrame("Let me check on that."))
+
     fetch_image_function = FunctionSchema(
         name="fetch_user_image",
         description="Called when the user requests a description of their camera feed",