Hello.
user
Hello.
assistant
I want to change my existing reservation, can you please help me with this?
user
How can I assist you today? Ok, I will help you with changing the reservation.
assistant
Thank you.
user
Please provide your name for checking the reservation status.
assistant
I am Mark Lopez.
user
There is no reservation found under your name.
assistant
Ok, no problem. Thank you for your information.
user
Welcome, have a great day.
assistant