Hello.
user
Hello, how may I help you for the day?
assistant
I want to change my existing reservation, my music concert got postponed. Can you please help me out with that?
user
Sure, we are here to help you.
assistant
Thank you for accepting my request.
user
May I know your good name to check your reservation status?
assistant
I have reserved it on the name of Betty Jackson.
user
Ok, please be on hold.
assistant
Sure.
user
Sorry, we did not find any reservation on your name.
assistant
Oh! No issues, I think I have done a wrong reservation. Thank you for checking.
user
Thank  you for choosing us with a query.
assistant
Welcome.
user