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

ASSISTANT: What kind of movies to you like, and why do you like this type of movie? , USER: I like movies from Disney and Pixar studios and I like them because they're usually light hearted and upbeat and fun. , ASSISTANT: Can you name a particular movie that you like? , USER: I like a Toy Story 3.
Toy Story 3