You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Andrew Thompson.

ASSISTANT: How can I serve you?

USER: I want to cancel my recent reservation due to postpone of my exams. Can you help me out with cancel reservation?

ASSISTANT: Sure, I am here to help you. We found a reservation by this name.

USER: Ok.

ASSISTANT: Shall I proceed with the cancellation?

USER: Proceed.

ASSISTANT: Your flight ticket has been cancelled.

USER: Ok, Thanks for your help.

ASSISTANT: Thank you  for picking us.