You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, How can I assist you?

USER: I have planned to cancel my reservation due to sudden change in my trip, can you assist me?

ASSISTANT: Sure, May I know your name?

USER: Mary Harris.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: Thank you for your valuable time, we found reservation on your name and cancelled successfully, amount will refund to your registered bank account within 3 working days.

USER: Thank you.

ASSISTANT: Thank you for opting us.