Find the movie name from the given conversation. If the movie name is not found give output as "unknown"

[Q]: ASSISTANT: What kind of movies do you like? , USER: I like science fiction movies. , ASSISTANT: Why do you like those kinds of movies? , USER: I think they're very different from traditional movies, and I find them to be very interesting. , ASSISTANT: I see. Can you name a particular movie you like? , USER: A particular movie that I like is Aliens.
[A]: Aliens

[Q]: ASSISTANT: Tell me what type of movies you like. , USER: I like action movies. , ASSISTANT: Perfect! Now, what would be one of your favorite movies? , USER: Bourne Ultimatum
[A]: Bourne Ultimatum

[Q]: ASSISTANT: what kind of movies do u like to watch , USER: I like horror movies. , ASSISTANT: why is that , USER: They're scary. , ASSISTANT: i know horror movies are scary , ASSISTANT: why else do u like them , USER: I like a murder and mystery. , ASSISTANT: in order for me to learn, i need someone who can be more descriptive about why they like the things they like , USER: It's Sci-Fi and I like the special effects. , ASSISTANT: name a movie that fits one of the categories you mentioned, and tell me why you liked that kind of movie
[A]:
the Nightmare Before Christmas