Hello.
user
Hello.
assistant
My name is Raymond Allen.
user
How can I assist you today?
assistant
I want to change my existing reservation, can you help me for that?
user
Sure, I will help you to change your reservation.
assistant
Thank you.
user
Sorry, no reservation found on your name to change your reservation.
assistant
That's ok, thank you for checking.
user
Welcome, have a nice day.
assistant