Missing passenger

An elderly man who suffers from dementia was traveling on a cruise ship at night across the sea when he suddenly wakes up from a bad dream. He gets up, looks out his cabin’s window, and gets confused about where he’s at and where the strange ship he’s on is going. The next morning a crew member informs the captain that a man has gone missing. “Sir, we have a passenger missing.” Says the crew member. The captain responds “All of our passengers have an idea of where we are going, he probably just wasn’t on board.”