Hi.
user
Hello, How can I best serve you today?
assistant
Due to sudden change of my business meeting because of some technical problem, I need to change my reservation so can you help me with that?
user
Sure, I am here to help you with that, can I know your good name to proceed further?
assistant
I am Sarah Carter.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
No issue, thanks for the information.
user
 Thank you for choosing us.
assistant