You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: Unexpectedly, my trip was cancelled. So please help me to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. Let me know your name, to check details?

USER: My name is Dorothy Parker.

ASSISTANT: There is a flight ticket found on your name, shall I proceed to cancel?

USER: Sure. Please cancel it.

ASSISTANT: Yes Parker, your ticket has been cancelled.

USER: OK, thank you for helping me.

ASSISTANT: Thank you for choosing us, have a nice day.