How do I buy chat?

Excuse me, could you clarify your question? It seems like you might be asking about purchasing something related to "chat," but "chat" is not typically a commodity or asset that one can buy directly, like stocks or cryptocurrencies. Perhaps you're referring to a specific chat application, chatbot, or some other chat-related service? If so, the process for purchasing it would depend on the specific product or service. If, on the other hand, you're actually referring to buying a cryptocurrency called "CHAT" (assuming such a currency exists), then the process would typically involve finding a cryptocurrency exchange that lists CHAT, creating an account on that exchange, depositing funds into your account, and then using those funds to purchase CHAT. Could you please provide more context or clarify your question so I can give you a more accurate answer?