You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER:  Due to tornadoes happening here, I am not able to go to airport to catch my flight, can you please cancel my reservation?

ASSISTANT: Sure, can you mention your name to check the flight is reserved are not?

USER: Sure, my name is Kenneth Lee.

ASSISTANT: Kenneth Lee, I couldn't find any reservations on your name.

USER: It's ok, no problem it may be cancelled by my colleagues. Thank you for your information.

ASSISTANT: Might be done by them.Thank you for choosing our services.