You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you?

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

ASSISTANT: Sure. May I know your name?

USER: I am Melissa Thompson.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Thanks for your time. We found a reservation by this name.

USER: Please cancel it.

ASSISTANT: Your flight ticket has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for choosing us.