If anybody wants to go Bangalore(K.R Puram,Yesvantpur) from Chennai at last minute don't worry u can purchase unreserved ticket and board this train one hour before the departure time, in general compartment u will easily get a seat. Also mobile charging point available in general compartment also. This was my favorite day train to reach Bangalore from Chennai.Even last week i travelled in this train from Chennai to Bangalore(K.R puram).