Trapped Inside Train Escape

A luxury train has started and everyone wants to travel on that train but not everyone can afford it because it is a very expensive train. You are a lucky fellow because you are rich and so you have managed to book a ticket and travel on the train. You fall asleep while travelling and later when you open your eyes you find out that you have not only reached your destination but everyone who was travelling on the train have got out of the train and the main door of the train is locked. So, that means you are trapped inside the luxury train. How will you escape?