Hi, I am Frank Lewis.
user
Hello, how may I help you?
assistant
Owing to an emergency, my appointment with doctor got postponed. So I want you to change my existing reservation.
user
Ok, please wait for a while.
assistant
Sure.
user
Sorry, there was no reservation found with your name.
assistant
Ok, no worries at all. Thank you for your help.
user
Thank you for opting us.
assistant