I am travelling from Kacheguda to New Delhi on 16th April 2015. I booked a 3AC ticket in karnataka sampark kranthi express - 12649 which is still in Waiting List. Are Wait Listed passengers allowed in the AC coach? What charges are deducted if I cancel this ticket when the chart is prepared (assuming the status didn't change from WAITING LIST) ? Ideally a wait listed ticket on cancellation should give full fare refund, isn't it?