You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I want to cancel my reservation, because I have exams on those dates so I have decided to cancel this trip, can you please cancel my reservation?

ASSISTANT: Sure, I will help you with cancelling your reservation.

USER: Thanks.

ASSISTANT: May I know your good name for checking existing reservation status?

USER: Sure, my name is Andrew Nelson.

ASSISTANT: Ok, please wait a moment.

USER: Ok.

ASSISTANT: Thank you for waiting. Sorry Nelson, there is no reservation found under your name to cancel.

USER: It's ok no problem. Thank you for your information.

ASSISTANT: Most welcome. Thank you for reaching us.