What can I do for you, sir?
I am Tim Green in Room 1021 and I want a wake-up call at five thirty AM tomorrow.
Yes, I see. five thirty AM Mr. Green, Room 1021.
I want to change my wake-up time.
Ok, could you tell me your room number and your name?
Tim, in Room 1021.
And when would you want us call you this time?
At six thirty AM tomorrow.