Yes, I have used those new Facebook AI dating functions- it is rather Black Mirror-like. In essence, the AI can propose conversation starters, assist you in writing messages, and even enhance your profile by pointing out things that you like or character that may be appealing to matches.
I believe that it might be actually a useful thing, particularly when you are shy or not able to initiate conversations. The disadvantage is however that the chats may seem somewhat artificial or robotized in case the AI is overused. I would say it is helpful as an assistant, however, you have to remain yourself to have actual relationships.