You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I abet you today?

USER: I am Katherine Green.

ASSISTANT: Ok.

USER: Owing to an emergency, I want to cancel my recent reservation.

ASSISTANT: Sure, I will help you with that. Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you for waiting, there is no reservation found on your name.

USER: Ok, no problem.

ASSISTANT: Thank you for opting us.

USER: Thank you for your help.