Hey Urvashi,
Change of written test centre within a city wil not be entertained. However, a change can be permitted by submitting an application to the JEE Cell before 11th April (Date has already passed by) along with a non-refundable fee of Rs.1000 through demand draft in favor of NCHMCT, payable at Delhi/Noida, The National Council of Hotel Management reserves the right to reject such a request in case the test centre doesn't have space to accomodate another candidate.
Hope this all, all the best for the future.
Regular exam updates, QnA, Predictors, College Applications & E-books now on your Mobile