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 action movies that are relevant today. , ASSISTANT: Can you name a particular movie that you like? , USER: Guardians of the Galaxy. That one was out a few years ago, but I was disappointed with the ending.
Guardians of the Galaxy