I'm not sure they would still be available, but I have cancelled a few reservations this morning for the following times. All were for a party of 4.
Tuesday, October 3rd at 9:05 AM - Kona Cafe at the Polynesian
Tuesday, October 3rd at 4:50 PM - Minnie's Seasonal Dine at Hollywood & Vine Fantasmic Dining Package
Wednesday, October 4th at 8:15 PM - Ohana at the Polynesian
Thursday, October 5th at 8:15 PM - Ohana at the Polynesian
I also have an extra reservation for Cinderella's Royal Table that I will probably be cancelling soon. I am waiting to hear back from a friend that is going the same week to see if she wants to try to get it.