Hi Vignesh!
It's certainly understandable if things come up and vacation plans have to be shifted. It's pretty simple to change your
Walt Disney World tickets if you need to reschedule your vacation. I helped my mother-in-law do just that a couple of months ago when she had tickets to Disney's Hollywood Studios, but didn't go because of a storm.
You will need to call the Walt Disney World Existing Ticket Line, number located on the
Help Center website, and let them know you need to change your ticket dates. If there is a change in price between your initial purchase and the new dates you are selecting, you will be responsible for paying the difference. You will need to have your ticket purchase confirmation number handy for them to look up your account.
One thing to keep in mind when rescheduling your vacation and tickets is
Theme Park Reservation Availability. I suggest taking a look at the
availability calendar first to make sure the new dates you are looking into are open to book for the theme parks of your choice.
Please stop back by if you have any additional vacation planning questions.
Have a magical day!
Leslie