You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you ?

USER: I am Gregory Lee.

ASSISTANT: What can I do for you Gregory Lee?

USER: I want to cancel my reservation that was made last week because my plan for going to an adventure trip got cancelled.

ASSISTANT: Sure, we are here to help you. Wait for some time.

USER: Sure.

ASSISTANT: We found reservations on your name. Shall I proceed for cancel ticket?

USER: Will there be any charge for cancelling my ticket?

ASSISTANT: Yes, 15% from the refund will be detected.

USER: Ok fine. Please proceed.

ASSISTANT: Your ticket has been cancelled.

USER: Thanks for your assistance.

ASSISTANT: Thanks for choosing us.