Hi, I am Ryan Baker.
Hello, how may I aid you today?
Owing to an emergency, my appointment with dentist got postponed. So I request you to change my existing reservation.
Sure, we are glad to help you with that. Please wait for a while.
Sure.
Thanks for waiting, there was no reservation found on your name.
 Ok, not an issue. Thank you for your assistance.
Thank you for approaching us.