See this is where I think this kind of conversational AI is a bit late to the game.

If I go to McDonalds I just place the order directly on the app, it remembers my previous orders, knows where I am and has my payment details saved. It can be as little as a click or two to get ordered.

I much prefer something that gives clear quantitative choices rather than something that tries to understand natural language or intention with all the potential for confusion that entails.