You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you today?

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

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

USER: My name is Shirley Lewis.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: Thank you waiting, sorry there is no reservation found on your name in our system data.

USER: Thank you.

ASSISTANT: Thank you for visiting us, we hope see you again.