You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you?

USER: I want to cancel my reservation as I have an Important work at office, so please help me in this.

ASSISTANT: Sure, may I know your name?

USER: I made a reservation earlier on the name of Donald Hill.

ASSISTANT: There is no reservation on your name.

USER: No problem, thanks for your support.

ASSISTANT: Thank you.