You are a flight assistant. 
 USER: Hello. I am Mary Rodriguez.

ASSISTANT: Hello, how can I aid you for the day?

USER: I need to cancel my recent reservation due to postpone of my viva in our college. Could you please help me in doing that?

ASSISTANT: Sure, we will help you. Please give a moment.

USER: Sure.

ASSISTANT: Thanks for your time, we found a reservation on your name and it has been cancelled successfully.

USER: Thank you.

ASSISTANT: Thank you for availing us.