Telegraph India. With its commercial operations having commenced from Mumbai on November 2, the train has already received a good response, with all classes fully booked and passengers being placed on waiting lists. New Delhi, Nov 2 (PTI) The Bengaluru-Mumbai Vande Bharat Sleeper train, flagged off by Railway Minister Ashwini Vaishnaw on November 1, is said to be the fastest train operating on the route and.