You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I serve you today?

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

ASSISTANT: Sure, may I know your name please?

USER: Christopher Thomas here.

ASSISTANT: We found reservation on your name, shall I cancel your reservation?

USER: Yes, please.

ASSISTANT: Ok. Your ticket has been cancelled.

USER: Thank you for your help.

ASSISTANT: Thank you.