Hi Peishan, welcome to planDisney!
I can certainly walk you through the process of revising your
theme park reservations! First, you will need to cancel your current reservation. You can do this by logging in to your
Disneyland Resort account, selecting the "My Disneyland" link, and clicking the "Ticket and Reservation Details" link. Next, select the reservation you would like to cancel and click "Cancel Reservation". Once canceled, head back to the "Ticket and Reservation Details" link, and you can go ahead and book your new reservation!
And before I let you go, I do have some news to share! The
Main Street Electrical Parade and
Disneyland Forever fireworks will be ending their limited-time runs on September 1, 2022. I highly recommend you try to visit the Disneyland Resort before then so you can enjoy these amazing nighttime experiences before they fly away!
See ya real soon!
Jin