Disney does not have a "native" alert system within the My Disney Experience app to notify you when a sold-out restaurant has a cancellation. Reservations for popular spots like "Be Our Guest" or "Space 220" open 60 days in advance and often vanish in seconds. However, you can use third-party services—such as Stakeout, MouseDining, or MouseWatcher—to do the work for you. These services constantly "scrape" the Disney booking site for openings. You simply select the restaurant, date, and time you want, and they will send you a text or email the moment a table becomes available. Because someone else's cancellation is your opportunity, you have to act fast—often within seconds of receiving the alert—to grab the spot. While some of these services offer a free basic tier, the most reliable "instant" text alerts usually require a small monthly subscription or a "per-search" fee. It is the most effective way to snag a "hard-to-get" table without refreshing your phone 500 times a day.