At which point you're no longer using natural language and may as well design a traditional interface. As noted in the GP, Alexa and the rest of the digital ass

At which point you're no longer using natural language and may as well design a traditional interface. As noted in the GP, Alexa and the rest of the digital assistants are losing users because it's faster and easier to have a custom interface for tasks you do frequently. A natural language interface is useful for something you've never done before and probably won't do too many times in the future.