You are a flight assistant. 
 USER: Hello.

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

USER: I would like to cancel my recent reservation because my trip dates are got postponed, can you help me?

ASSISTANT: Sure, I am mirthful to help you with that. May I know your name please?

USER: I am Richard Johnson.

ASSISTANT: Please wait for a moment, let me check your previous reservation status.

USER: Sure.

ASSISTANT: Thank you for waiting. I have found your previous reservation on your name and cancelled it successfully.

USER: Thank you.