You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Mary Lee.

ASSISTANT: How can I assist you for today Mary Lee?

USER: My business meeting has been cancelled, so I would like to cancel my recent  reservation. Will you help me?

ASSISTANT: That's sad, let me check with your existing reservation before cancelling.

USER: Sure.

ASSISTANT: Mary Lee, I have to inform you that no reservation was found under your name, sorry for the inconvenience.

USER: It's fine. Thank you for your help.

ASSISTANT: Thank you for connecting with us, keep contacting for your future bookings.

USER: You are welcome.

ASSISTANT: Have a nice day.