There is a similar story which is about two travellers sitting next to each other on a train (normally a man and a woman). One of them is reading a book and the other person asks what the book is about, and the first person says that it's about ghosts. They then have a conversation about ghosts, and the second person asks the first if they believe in ghosts or have ever seen one, to which the first person says that they have never seen or believed in ghosts at all. The second person replies that this is doubtful, and vanishes. This was the version used in the "Scary Stories to Tell in the Dark" book series.