You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How exactly I can serve you the best today?

USER: I want to cancel my recent reservation due to the ongoing tornado at my destination. Can you help me to cancel my reservation?

ASSISTANT: Sure, I would be happy to help you.

USER: Thank you.

ASSISTANT: May I know your good name?

USER: Sure, I am Stephen Hill.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, we found no reservation on your given name.

USER: Please cancel my reservation.

ASSISTANT: Thank you for choosing us.

USER: Thanks for your quick response.