Hello, I am Timothy Thomas.
user
Hello. How can I useful to you?
assistant
I intend to change my existing reservation as my appointment with my doctor got postponed. Can you help me with it?
user
Sure, I'll help you with this. Please wait a moment I will check the reservation status.
assistant
Sure.
user
Thanks for waiting, I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
It's ok, thank you for the response.
user
Thank you for opting us.
assistant