Hi, Luciana! Currently, there isn't a free dining promotion being offered, but you will be able to find it on the official
Walt Disney World Special Offers page if one becomes available in the future. I would encourage you to go ahead and make your reservations so you'll be more likely get the dates and accommodations you want. Then, when (or if) promotions are released, you can modify your reservation to include the package components and deal, subject to availability. Disney will not automatically modify your reservation, you will need to call 407-W-DISNEY to check availability and make the change, if possible. There will not be a fee to update the same reservation with the promotion. If it's a free dining promotion, you will be reimbursed for the dining plan if you have already paid for it, or you can add it at no charge at that time. Keep an eye on the Special Offers
page for one that might work for you, your travel dates, and your accommodations. Happy planning and have a Magical vacation!