Hello.
user
Hello, how may I aid you?
assistant
 I would like to cancel my flight reservation as my trip got postponed, can you please help me?
user
Sure, I am happy to help you. May I know your good name to proceed further?
assistant
I am Sarah Gonzalez.
user
Sorry, there is no active reservation on your name in our data.
assistant
That's ok, thank you for checking.
user
Thank you for choosing us.
assistant