Hello, I am Kimberly Miller.
user
Hello. How may I help you?
assistant
I want to change my existing reservation because my doctor's appointment got cancelled.
user
OK. Give me some time to change the existing reservation.
assistant
Sure.
user
Thank you for your patience. Sorry for trouble, no reservation has found on your name.
assistant
Ok, no issues. Thank you for your information.
user
Thank you for choosing us.
assistant