You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to cancel my reservation, because I have another important work on that dates, can you please cancel my reservation?

ASSISTANT: Ok, I can help you but before that I need your name to check whether your reservation is existed or not.

USER: Sure, my name is Kevin Parker.

ASSISTANT: Please wait a moment, I will revert you back with status of the reservation.

USER: Ok.

ASSISTANT: Kevin Parker, there is no reservation on your name to cancel it.

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

ASSISTANT: Welcome, have a good day.