You are forced onto a train the only other person is the conductor nobody else will ever be on it just you 2

This is the reward and punishment train ask for a punishment the train gives it and as for a reward the train gives it

You are stuck forever you take a pill which keep you alive forever and stops you from ageing and the train will never stop again

The train wont talk only the conductor can

The train is the one giving the punishments/rewards so just ask and got it

Enjoy your new life