Hello Luis!
A very warm welcome to
planDisney! Thanks for bringing your question our way!
I’m sure you’re looking forward to your vacation to “The Happiest Place on Earth!” And, it sounds like you are aware of the requirement for making an advanced
Theme Park Reservation. This reservation is required in addition to your valid admission ticket and you can make a reservation for one theme park each day of your trip. Reservations are currently being accepted through December 2021.
Your Theme Park Reservation confirmation email lists some cancellation guidance at the very bottom. It states that if your travel plans change, you should cancel as soon as possible to give other Guests the opportunity to visit the park.
Disneyland Resort Theme Park Reservations may be canceled until 11:59 p.m. the day prior to your scheduled visit. If for some reason you do not cancel your reservation and are unable to visit as scheduled, you will have an opportunity to reschedule your visit to another day (subject to availability).
I hope this helps! Please come back to see us here at planDisney!
Tiffanie