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

ASSISTANT: Could i ask u some questions about your movie preferences? , USER: Yes , USER: Mostly I like action science fiction movies that make you think. , ASSISTANT: could u name a movie that fits that category, and tell me some things you like about that kind of movie , USER: Like the Terminator 2 was a really good science fiction and action movie based on a possible future where robots take over. It really makes you think, actually even recently, about artificial intelligence, and how they you can replace humans.
Terminator 2