Hi.
user
Hello. May I know your name?
assistant
I am Alexander Rodriguez.
user
How can I assist you?
assistant
Due to some emergency work, I need  your help in changing my existing reservation.
user
Ok, Please stand by.
assistant
Ok.
user
Thanks for being patience. There is no reservation found with your name.
assistant
Ok, thanks for the information.
user
Thanks for choosing us.
assistant