Hello.
user
Hello. How can I help you today?
assistant
My name is Debra White. I want to do some changes in my existing reservation. Can you help me for that?
user
Sure, I will help you in modify your reservation.
assistant
Thank you.
user
Sorry, I did not find any reservation on your name.
assistant
That's ok, thank you for checking.
user
Welcome, have a nice day.
assistant