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

ASSISTANT: Can you tell me what types of movies you enjoy watching? , USER: Lately I've been really into movies that are documentary and especially ones that show what's happening behind the scenes, what's involved in making film. , ASSISTANT: Alright, whatâ€™s one of your favorite movies? , USER: Let me think of one. I really liked Okay, it's by Richard Linklater. I can't remember the name of it. But it was the one where like there were four different movies happening on the screen at once. Do you know the name of it? , ASSISTANT: Hmm, let me think.. , USER: Oh, oh, I know what it was. It was Waking Life.
Waking Life