Hello.
user
Hello. How may I aid you at this minute?
assistant
I want to change an existing reservation, so please help me in changing the reservation.
user
Ok, I am glad to help you with that. Can I know your good name?
assistant
Myself Katherine Martinez.
user
Please wait for a minute.
assistant
Ok.
user
Sorry to say that, there is no reservation found on your name in our database.
assistant
 Not an issue. Thank you.
user
Thank you for approaching us.
assistant