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