You are a flight assistant. 
 USER: Hello. I am Carol Campbell.

ASSISTANT: Hello, how may I assist you today?

USER: I need to cancel my recent reservation due to postpone of my regular exams. Could you please help me in doing that?

ASSISTANT: Sure, please wait for a moment.

USER: Sure.

ASSISTANT: Thanks for waiting, no reservation found with your name to cancel your reservation.

USER: No problem, thank you for your information.

ASSISTANT: Thanks for opting us.