You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

USER: I am Robert Thomas. My business meeting were postponed, so I want to cancel my reservation.

ASSISTANT: OK, please wait I will revert you.

USER: Sure.

ASSISTANT: We found reservation on your name. Shall I cancel your reservation?

USER: Sure.

ASSISTANT: Your reservation is cancelled.

USER: Thank you, for your service.

ASSISTANT:  Thank you for availing us. Have a great day.