feat(v2beta1): add a field to indicate whether slot filling is cancelled (#306)

* feat: added a field in the query result to indicate whether slot filling is cancelled.

PiperOrigin-RevId: 375741797

Source-Link: googleapis/googleapis@5e797ab

Source-Link: https://github.com/googleapis/googleapis-gen/commit/45498d9cadeca0484a3b2a14fa6edbbaf165ac9b

* 🦉 Updates from OwlBot

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Author: gcf-owl-bot[bot]

google/cloud/dialogflow_v2beta1/types/session.py

@@ -353,6 +353,9 @@ class QueryResult(proto.Message):
             -  ``true`` if all required parameter values have been
                collected, or if the matched intent doesn't contain any
                required parameters.
+        cancels_slot_filling (bool):
+            Indicates whether the conversational query
+            triggers a cancellation for slot filling.
         fulfillment_text (str):
             The text to be pronounced to the user or shown on the
             screen. Note: This is a legacy field,
@@ -414,6 +417,7 @@ class QueryResult(proto.Message):
     action = proto.Field(proto.STRING, number=3,)
     parameters = proto.Field(proto.MESSAGE, number=4, message=struct_pb2.Struct,)
     all_required_params_present = proto.Field(proto.BOOL, number=5,)
+    cancels_slot_filling = proto.Field(proto.BOOL, number=21,)
     fulfillment_text = proto.Field(proto.STRING, number=6,)
     fulfillment_messages = proto.RepeatedField(
         proto.MESSAGE, number=7, message=gcd_intent.Intent.Message,