Complex sentence: Peter mentions that he is honored to have dinner with "two of the Ghostbusters" which Chevy replies that he was not in the movie, although he did actually appear in the music video for the movie's theme song.
Split into simpler sentences: Peter mentions that he is honored to have dinner with "two of the Ghostbusters". Chase replies that he was not in that movie, although he actually appeared in the music video for the movie's theme song.