You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you now?

USER: I want to cancel my reservation as I have some work at office, so aid me in cancellation.

ASSISTANT: Sure, I am here to aid you.

USER: Ok.

ASSISTANT: Let me know your name to check the existing reservation?

USER: Sure, my name is Elizabeth Green.

ASSISTANT: Please, wait a minute.

USER: Sure.

ASSISTANT: Thanks for your time, I found a reservation on your name. Do you want me to cancel it?

USER: Ok, you can proceed to cancel.

ASSISTANT: Your reservation has been cancelled.

USER: Thanks for your help.

ASSISTANT: Thank you for opting us.