Artificial Intelligence has been applied on robots nowadays. Those robots are not dulls at all. They can be programmed to talk like human beings, although sometimes they do make funny things that make you laugh. Robot that can talk is called chatbots. In fact, what make them think and speak is just the logic program inside them.
Here's a video showing the dialogue of two chatbots. Their conversations may seem logical at first, sometimes they make sense. But after talking for a while you can notice that they are talking nonsense. No matter how good they speak, they are just result of artificial intelligence, nowdays.