You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: Can you please help me to cancel my reservation?

ASSISTANT: Sure, I can help you. May I know your name?

USER: I am Donald Hill.

ASSISTANT: We found a reservation by this name.

USER: Ok, please cancel it.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you.