You just cannot do anything Mr. Ravi. The train runs jampacked. 10 minutes within departure from NDLS, there'll be a TTE beside your berth, calling out your name thrice or twice depending on his age and patience levels. Silence would elate him and the men following him with waitlisted PRS tickets in hand. 5 minutes from then, you won't matter to him anymore and your appearance in the train thereafter will be treated as per "extent railway rules" as they call it.