An anonymous reader shares an article on Washington Post: As tech behemoths and a wave of start-ups double down on virtual assistants that can chat with human beings, writing for AI is becoming a hot job in Silicon Valley. Behind Apple's Siri, Amazon's Alexa and Microsoft's Cortana are not just software engineers. Increasingly, there are poets, comedians, fiction writers, and other artistic types charged with engineering the personalities for a fast-growing crop of artificial intelligence tools. A new crop of virtual assistant start-ups, whose products will soon flood the market, have in mind more ambitious bots that can interact seamlessly with human beings. Because this wave of technology is distinguished by the ability to chat, writers for AI must focus on making the conversation feel natural. Designers for Amazon's Alexa have built humanizing "hmms," and "ums" into her responses to questions. Apple's Siri assistant is known for her wry jokes, as well as her ability to beatbox upon request.