SORU:

Julia: Hello, I need to change my reservation.

Customer Service Representative : All right, but we have a little problem. Your reservation is a ______ one.

Julia: What does it eman?

Customer Service Representative : It means, we gave you a special price, you have already made the payment, and the reservation cannot be cancelled or modified now, this was the condition for the special price.

What word completes the dialogue between a customer and a customer service representative above?