You are a flight assistant. 
 USER: Hi, I am Carolyn Clark.

ASSISTANT: Hello, how may I serve you?

USER: I want to cancel my reservation due to postponement of my exams. Can you please cancel my reservation?

ASSISTANT: Sure, please wait a moment.

USER: Ok.

ASSISTANT: We found a reservation on your name. Shall I proceed with cancelling?

USER: Ok, please cancel.

ASSISTANT: Your reservation has been cancelled.

USER: Thank you.

ASSISTANT: Thank you for opting us.