NOSB = No Seat Berth (If Child Age Less Than 11 And Opted For ½ Ticket)
Cancelled Is Liye Hosakta Hai Shyaad IR Ne Seat Allot Kar Diya Hoga... Fir Wo Seat/Bearth Cancel Kar Diya Hoga, Ya Koi Technical Error Hoga, Up-grading System For New Rule For ½ Ticket., Example Ke Liye Check This Post "
/pnr/post/1688369 " E-Titcket Pe No Seat Allotted Aur Chart Mein Seat Allotted...