I'd smile and enjoy the fact that I *finally* had a worthwhile TNG dream.
Can't answer to "but if it really
happened", because it wouldn't. The Enterprise would never be deserted unless it was abandoned for catastrophic reasons or a barium sweep. Or... "Q" somehow took an interest in my petty little life and decided to have some fun, cloning a fully functional Enterprise D and putting me on it, like a rat in a maze.