Hello, I'm Samuel Johnson.
Hello Samuel, how may I help you?
Due to the postponement of exams in our college, so I would like to change my existing reservation.
Let me check your existing ticket status in our database. Please wait for a moment.
Ok sure, take your time.
Sorry, we could not find a reservation by your name.
That's ok, may my friend has canceled it before.
Thank you for choosing us.