Hehe, as the article says, there is an abundance of them. Dozens if (paid) online services... You can do it on your beefy graphics card... And as per this article to some degree with your Instagram account. I've tried it on my own and it'll generate something like internet fanfiction, or have a dialogue with you. It's a steep learning curve, though and requires some fiddling. And it was text only and I don't own a gaming computer, so it was unbearably slow. Other than that I try to avoid Meta's services or paying for those kind of "scientific" experiments so I wouldn't know how the voice conversation is like... Maybe someone can enlighten us.