Hi.
user
Hello, how may I help you today?
assistant
Can you please change my existing reservation?
user
Sure, may I know your name please?
assistant
I am Charles Davis.
user
Please wait for a minute, I will check the reservation list and get back to you.
assistant
Sure.
user
I have checked in reservation list to change your ticket, but could not find any reservation with your name.
assistant
Ok, Thanks for the information.
user
Thank you for choosing us.
assistant