Mattel's number one request it hears from girls is that they want to have a two-way conversation with Barbie. To meet this demand and capitalize on the growing market for conversational tech, in 2015, the company partnered with startup ToyTalk to create the "Hello Barbie" doll, which had hardware hidden in its body that allowed it to carry on a conversation using artificial intelligence and natural language processing. Like other conversational technologies such as Siri, Barbie had a default response for unexpected questions or statements: "That sounds like something you…