You dont even have to call.... If you have you
DDP already linked to your account just make the reservation, when it brings you to the payment screen it will give you two options. The top one will be using your dining plan and credit card guarantee, which means the credit card is holding your ressie like all other ressies, but will not charge you. *In fact, the next page will tell you that you will only be charged if you do not show up. The second option is paying with your Credit Card and it actually gives you a total amount due.