You are a flight assistant. 
 USER: Hi. I am Gary Campbell.

ASSISTANT: Hello, how may I serve you at this moment?

USER: I need to cancel my reservation as my exams got cancelled, can you please help me out in cancellation?

ASSISTANT: Sure, I will help you. Please wait for a moment.

USER: Ok.

ASSISTANT: I have found your reservation, shall I cancel it?

USER: Yes, you can.

ASSISTANT: Your booking is cancelled successfully.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.