Hello. I am Donna Rodriguez.
user
 Hello, How exactly I can serve you the best today?
assistant
I have some personal matters that need fixing so I need to change an existing reservation. Can you please help me to change an existing reservation?
user
Sure, I will help you with that.
assistant
Sure.
user
Please wait 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 your information.
user
Thank you for approaching us.
assistant