You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I aid you?

USER: I am Timothy Davis. Can you help me in cancelling my recent reservation, as my exam is postponed?

ASSISTANT: Sure. Please wait for a moment. While I am checking your flight reservation status.

USER: Sure.

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

USER: That's ok, thank you.

ASSISTANT: Thank you.