Hello. My name is Robert Moore.
user
Hello, how can I be a help for you?
assistant
My travel dates have been postponed. Can you change my reservation?
user
Sure, I am here to help you. Please wait for a moment.
assistant
Ok.
user
Sorry, there is no previous reservation found on your name to change.
assistant
It's fine. Thank you for your information.
user
Most welcome.
assistant