diff --git a/samples/python/13.core-bot/flight_booking_recognizer.py b/samples/python/13.core-bot/flight_booking_recognizer.py
index 1ddc1b7073..9baa7d20b5 100644
--- a/samples/python/13.core-bot/flight_booking_recognizer.py
+++ b/samples/python/13.core-bot/flight_booking_recognizer.py
@@ -17,6 +17,8 @@ def __init__(self, configuration: DefaultConfig):
             and configuration.LUIS_API_HOST_NAME
         )
         if luis_is_configured:
+            # Set the recognizer options depending on which endpoint version you want to use e.g v2 or v3.
+            # More details can be found in https://docs.microsoft.com/azure/cognitive-services/luis/luis-migration-api-v3
             luis_application = LuisApplication(
                 configuration.LUIS_APP_ID,
                 configuration.LUIS_API_KEY,