You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I am William Carter. Owing to an emergency, I want to cancel my reservation.

ASSISTANT: Ok. Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, there is no reservation found on your name.

USER: Not an issue.

ASSISTANT: Thank you for choosing us.

USER: Thank you for your service.