You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello, how may I serve you at the moment?

USER: Owing to an emergency I had to request for this cancel reservation.

ASSISTANT: Sure, I will help you with that. May I know your name?

USER: I am Katherine White.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no reservation found on your name.

USER: Thanks.

ASSISTANT: Thank you for approaching us.