You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you now?

USER: Actually there is a business meeting, but unfortunately it was cancelled. So please help me to cancel my recent reservation.

ASSISTANT: Sure, I am happy to help you. Please wait a moment, I will check the previous reservation status. May I know your good name for verification process?

USER: Please check for the reservation with name Margaret Hall.

ASSISTANT: Sorry to inform you, I have not came across your name in reservation list to cancel it.

USER: It's ok, thank you for spending your time.

ASSISTANT: You are welcome. Have a good day.