User: I really like science fiction themed movies.
Assistant: There are several movies in the science fiction genre that is currently showing.
User: I want a science fiction movie that isn't too depressing to watch. Maybe something with a bit of a cheery tone.
Assistant: Can you define 'cheery tone' so I can make a recommendation.
User: I'm thinking some thing like Star Trek Beyond or Hitchhikers Guide to the Galaxy.
Assistant: Are there any other criteria you want to add?
User: Yeah, there are some things I want to avoid in the science fiction genre.
Assistant: What are they?
User: I don't want to see something that has a very depressing, heavy feel to it.
Assistant: Can you give an example?
User: Children of Man and Elysium are movies I want to avoid.
Assistant: Is there something else you want to add?