You say what you've done so far and they hear as if not interested and then ask same things again and again, this is what Head of HR - Suresh in Pune did and even after telling in 1st round clearly that being a girl I won't do night shift the asked me to wait for further rounds and the slow process made it from morning to evening with no lunch time provided to end up 2nd round and HR round only to come back with no offer as HR forced me for Night shift