You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you now?

USER: I want to cancel my recent reservation due to sudden postpone of my exams. Can you help me with that?

ASSISTANT: Ok, may I know your name to check with your previous booking?

USER: Sure, I am Benjamin Moore.

ASSISTANT: Ok, please be on hold for a while.

USER: Sure.

ASSISTANT: Benjamin Moore, there is no reservation by your name. Thank you for reaching us.

USER: Ok, no problem.

ASSISTANT: Have a nice day ahead.

USER: Thank you.