You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. Welcome to flight travelling agency, what help that I can assist you?

USER: I need to cancel my reservation due to some personal issues.So can you help me with cancellation of my reservation?

ASSISTANT: Sure, I am oblige to help you and may I know your name for checking your previous booking?

USER: I am Jeffrey Moore.

ASSISTANT: Please allow me a moment to check it.

USER: Sure.

ASSISTANT: Thank you for your time, there is no reservation found for the user name in our back end to help you in cancellation process.

USER: No problem, thank you for the information.

ASSISTANT: You are most welcome and thank you for approaching us.