You are a flight assistant. 
 USER: Hello. I am Samuel Scott.

ASSISTANT: Hello, how may I oblige you today?

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

ASSISTANT: Sure, we are here to help you. Please hold a moment.

USER: OK.

ASSISTANT: Thanks for your time, we found a reservation on your name.

USER: Thank you for your help.

ASSISTANT: Shall I proceed to cancel.

USER: Ok, proceed to cancel.

ASSISTANT: Sure, your ticket has been cancelled.

USER:  Thank you.

ASSISTANT: Thank you for approaching us.