With the rise of chatbots and voice assistants, there has been a lot of talk about the rise of conversational user interfaces (CUI). CUIs allow users to interact with a system using natural language. The most common CUIs are chatbots and voice assistants. CUIs are not new. They have been around for a long time. The first chatbot was created in 1966, and the first voice assistant was built in 1978.