User: I'm looking for a movie that is exhilarating to watch.
Assistant: Okay, so an exciting movie, maybe like a thriller?
User: Yes, something with a good twist maybe.
Assistant: Perhaps a movie like Memento, Shutter Island or The Sixth Sense would be good?
User: I have seen those movies and that is the type of movie I am looking for. I like psychological thrillers. Something that will shock me.
Assistant: Do you have favorite movie out of the three I listed?
User: I liked Memento the best, but its only great the first time you see it. Well most of these movies are. Something like Memento would be great. I think I sat and stared at the screen for 5 minutes with my jaw dropped when I saw that the firt time.
Assistant: Have you seen a movie called "The Unknown", its listed as being similar to Memento.