Hello.
user
Hello. How may I assist you?
assistant
Can you help me in changing my existing reservation?
user
Sure, I am glad to help you and may I know your name please?
assistant
I am Karen Wilson.
user
Please give me a moment.
assistant
Sure.
user
 Thank you for waiting, I have checked in reservation list to change your ticket but could not find any reservation with your name.
assistant
Ok, no problem. Thanks for the information.
user
Thank you for reaching us, have a nice day.
assistant