You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I help you today?

USER: I book a ticket for two days to visit at Detroit, but due to heavy snow at Detroit I want to cancel my flight ticket.

ASSISTANT: Sure, May I know your name?

USER: My name is Scott Campbell.

ASSISTANT:  Wait a minute.

USER: Sure.

ASSISTANT: Sorry to tell that there is no reservation on your name.

USER: Thank you for the information.

ASSISTANT:  Thank you for contacting us.