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