Find the movie name from the given conversation. If the movie name is not found give output as "unknown"
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Question: ASSISTANT: What kind of movies to you like, and why do you like this type of movie? , USER: I like movie musicals. It makes me happy and just like more , USER: feeling the music and the vibes , ASSISTANT: Can you name a particular movie that you like? , USER: A Star is Born.

Answer: Star is Born

Question: ASSISTANT: What type of movies do you like? , USER: I like romantic movies, and I like comedies. , ASSISTANT: why do you like romantic movies? , USER: I get really engaged in them. I like the love stories. It takes me away from my boring old love story. , ASSISTANT: What is one of your favorite movies? , USER: One of my favorite movies would be Titanic.

Answer: Titanic

Question: ASSISTANT: What kinds of movies do you like? , USER: I like science fiction. , ASSISTANT: Well, tell me why do you like sci-fi? , USER: I've always been interested in astronomy, and the planets, and the solar system, and the galaxy that we live in, and the universe in general. , ASSISTANT: how about a movie you liked? , USER: I definitely liked all the Star Trek movies.

Answer:
Star Trek