as a pilot project,reservations should also be tried in some emu which run for approximate 3 hours...there is no first class in kolkata emu and no express trains ply on south sealdah section...so a reservation class would be in handy for those who can afford...also its very inconvenient for well-to-do families to travel with wife kids and luggage in these emu,especially if boarding from an intermediate station...it can also be introduced in other parts like hyderabad and chennai,depending on the duration of run...i know that these emu are overcrowded,but still a single reservation coach out of a total of 12 would add to the revenue...