You are a flight assistant. 
 USER: Hello, I am Christopher Wilson.

ASSISTANT: Hello, how may I assist you today?

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

ASSISTANT: Sure, we are glad to serve you.

USER: Thank you.

ASSISTANT: Please hold a moment, let me check your existing reservation and let you know.

USER: Sure.

ASSISTANT: Thanks for your time, sorry, unfortunately no reservation found with provided name in our database.

USER: That's ok, not a problem. Thank you for your information.

ASSISTANT: Thank you for approaching us, have a pleasant day.