I agree, it was the attitude of the manager that was the most disheartening, not the fact that you could not use the free dining coupon. That in my opinion is unacceptable. Regardless of what level status you are, that is no way to treat a customer. I'm glad you notified guest services because they should be made aware of that rude behavior. He should of been extremely apologetic and yes, I think you should of been able to keep the last dining coupon due to their error which was none of your own. Since you were already in the process of using it. They could eat that up without much any off loss, it's better to retain customer satisfaction and keep you happy during the cruise. I've worked in hospitality before and these things could arise, however, when they do, we will not take it back. That part is extremely tacky .