I don't know specifically, but there are lots of options.

One I've heard is "sexting -> pictures from you -> blackmail."

Another one might be "flirting -> let's meet irl -> immigration says they want 20,000 pls help 🥺"

Could also be "flirting -> I just inherited 20,000 -> my grandma is trying to take it -> can you hold it for me?" where they're pretending to give you money, but there are bank transfer fees they need you to pay for some reason.

The AI convo step is just to offload the work of finding good marks. You're likely to get a real person eventually if you act gullible enough.