You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I need to cancel my reservation, please help me with that.

ASSISTANT: Sure, I will help you with the flight reservation cancellation. May I know your name please?

USER: Sure, myself Rebecca Harris.

ASSISTANT: I have searched online but I could not find your flight reservation to cancel it.

USER: Oh! It may not be booked properly. Anyway, thank you for your time.

ASSISTANT: Thank you for contacting us.