Still the trains in NOQ route originally are diverted because of the continuation in the Non-Interlocking Work @ NCB.As ur journey date is quite far from Now,better I'll update you later in November,may be last week.Now commenting anything on this issue would not be of much use,because cant predict how long the Non-Interlocking work will continue.But if you're coming from Bhutan,I would request you not to rely on the passenger train as its very uncertain.