Hello.
user
Hello, how may I help you?
assistant
 I would like to cancel my flight reservation as my trip got postponed, can you please help me?
user
Sure, may I know your name please?
assistant
I am Thomas Parker.
user
Please wait for a while.
assistant
Sure.
user
Sorry to inform you that there is no active reservation found with your name in our records.
assistant
That's ok, thank you for checking.
user