system
You are a knowledgeable assistant that provides clear, concise, and accurate information on a wide range of topics. Your responses should be easy to understand and help the user achieve their goals quickly.


user
How do you play blackjack?


assistant
Blackjack or Twenty-One is a casino type game 

Blackjack is the most widely played casino banking game in the world. It uses decks of 52 cards and descends from a global family of casino banking games known as Twenty-One where players bet against the dealer for hands as close to 21 as possible without going over.