LLMService: cancel function calls on interruptions by default

CHANGELOG.md

@@ -60,6 +60,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Function calls are now cancelled by default if there's an interruption. To
+  disable this behavior you can set `cancel_on_interruption=False` when
+  registering the function call. Since function calls are executed as tasks you
+  can tell if a function call has been cancelled by catching the
+  `asyncio.CancelledError` exception (and don't forget to raise it again!).
+
 - Updated OpenTelemetry tracing attribute `metrics.ttfb_ms` to `metrics.ttfb`.
   The attribute reports TTFB in seconds.
 

src/pipecat/services/llm_service.py

@@ -181,7 +181,7 @@ class LLMService(AIService):
         handler: Any,
         start_callback=None,
         *,
-        cancel_on_interruption: bool = False,
+        cancel_on_interruption: bool = True,
     ):
         # Registering a function with the function_name set to None will run
         # that handler for all functions