Hello.
user
Hello, how can I be a help for you?
assistant
I want to change my reservation, becasue I have another important work on those dates so I am unable to catch the flight. Can you please change my reservation?
user
Sure, may I know your good name please?
assistant
Sure, my name is Robert Campbell.
user
Sorry, there is no reservation found on your name to change.
assistant
Oh! It's ok no problem. Thank you for your information.
user
Thank you for approaching us.
assistant
Welcome.
user