You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I aid you?

USER:  I would like to cancel my flight reservation as my trip got postponed, can you please help me?

ASSISTANT: Sure. May I know your name please?

USER: I am Shirley Turner.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thanks for your time. I have not found flight reservation to cancel it.

USER: That's ok, thank you for checking.

ASSISTANT: Thank you.