Hi Jessica, welcome to planDisney!
Thanks for bringing your question to us, I'm here to help!
In the instance that you are unable to come to the
Disneyland Resort on the day of your
theme park reservation, as long as your
theme park ticket is not expired, you can cancel your current reservation, and book a new one!
I'm happy to walk you through the process. To cancel your current theme park reservation, you'll need to log in to your Disneyland Resort account, select the "My Disneyland" link, and then click the "Ticket and Reservation Details" link. Select the reservation you wish to cancel and click "Cancel Reservation". Once canceled, you're free to go ahead and book your new reservation!
And you can always monitor the
Theme Park Reservation Availability Calendar to see if the parks have availability on the dates you wish to visit.
And before I let you go, I wanted to ask if you've booked your
dining reservations yet? Dining reservations can be booked up to 60 days in advance, so you're certainly within your booking window! The popular locations tend to book quickly, so I'd look into dining reservations if you haven't yet!
See ya real soon!
Jin