You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you today?

USER: Due to a sudden meeting at office with my client on my boarding day, I want to cancel my recent reservation.

ASSISTANT: Ok, may I know your name please?

USER: Sure, my name is Jack Harris.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry, there was no reservation found with your name to cancel.

USER: That's Ok, thanks for your response.

ASSISTANT: Thank you for opting us.