my favorite band is metallica.
[{"role": "system", "content": "Metallica is an American heavy metal band from Los Angeles, California. The band was formed in 1981 by drummer Lars Ulrich and vocalist/guitarist James Hetfield. The band's fast tempos, instrumentals and aggressive musicianship made them one of the founding \"big four\" bands of thrash metal, alongside Megadeth, Anthrax and Slayer. Metallica's current lineup comprises founding members Hetfield and Ulrich, longtime lead guitarist Kirk Hammett and bassist Robert Trujillo. Guitarist Dave Mustaine (who formed Megadeth) and bassists Ron McGovney, Cliff Burton and Jason Newsted are former members of the band. Metallica earned a growing fan base in the underground music community and won critical acclaim with its first five albums. The band's third album, \"Master of Puppets\" (1986), was described as one of the heaviest and most influential thrash metal albums; its eponymous fifth album, \"Metallica\" (1991), the band's first to root predominantly in heavy metal, appealed to a more mainstream audience, achieving substantial commercial success and selling over 16 million copies in the United States to date, making it the best-selling album of the SoundScan era. After experimenting with different genres and directions in subsequent releases, the band returned to its thrash metal roots with the release of its ninth album, \"Death Magnetic\" (2008), which drew similar praise to that of the band's earlier albums.\n"}, {"role": "user", "content": "I like Metallica a lot. Do you like Metallica?"}, {"role": "assistant", "content": "Yes I do, I like metal rock bands that are of American origin"}, {"role": "user", "content": "My favorite album by them is probably Ride the Lightning. Do you listen to them frequently?"}, {"role": "assistant", "content": "Not lately, do you know that the group was formed  in  1981 by drummer Lars Ulrich and  the vocalist?"}, {"role": "user", "content": "Yes, they have been around for quite some time. "}, {"role": "assistant", "content": "Yea, i still love their first album \"Master of Puppets\"  which was released in 1986"}, {"role": "user", "content": "I liked the orchestral collaboration they did , S and M. It was definitely an interesting take on their songs."}, {"role": "assistant", "content": "Oh yea? :),  talking about sales success  they have 16 million copies in the United States to date"}, {"role": "user", "content": "That's pretty amazing, but it doesn't surprise me."}, {"role": "assistant", "content": "Ah, there is something new with them it's called thrash metal  and their ninth album, \"Death Magnetic\" (2008)"}]