Due to upgradation work of Delhi P.R.S. (Computerized Passenger Reservation System),the PRS Enquiry will remain closed for 5.00 hours from 11.30 p.m. on 29.3.2012 to 04.30 a.m. on 30.3.2012.Therefore, PRS related enquiry of Delhi PRS through IVRS/Touch Screen, Call Centre (Telephone no. 139) and functioning of current reservation bookings through computer will also remain closed during the period.