You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you today?

USER: Owing to an emergency I have request you to cancel my reservation. Can you please help me out with that?

ASSISTANT: Sure, we are here to help you.

USER: Thank you.

ASSISTANT: May I know your name to proceed further?

USER: I have done my reservation on the name of Stephen Lee.

ASSISTANT: Ok, please wait for a while, let me check your reservation.

USER: Sure, take your time.

ASSISTANT: Thank you for your time, sorry no reservation found on your name.

USER: Oh! I think the ticket was not booked due to server issue. Anyway, thank you for the information.

ASSISTANT: Thank you for availing us.

USER: Welcome.