Please let me know when the Current Booking closes for Train No. 12859 (Gitanjali Express) at Nagpur Jn. station, and if one may book (if such is available) confirmed/reserved seat for the 2S class at the Current Booking counter. I shall be disembarking at Nagpur Jn. (having taken the Train No. 12723 AP Express from Secunderabad) tomorrow, i.e., 25th Feb. at 3.45 pm. And the Gitanjali Express's scheduled departure from Nagpur Jn. is 7.05 pm. So, would this 'time window' be sufficient for me to try to get a confirmed/reserved seating in the 2S class? Please advise.