It's not really a robocall, it's a speech generator. These are the guys in India and Pakistan who don't speak English well enough to work for reputable call banks. They work the scams and use generated "American Woman" so that a: you can actually understand them and b: you're not aware that they are in some third world $hit-hole.
Caller is never interested in speaking to me after I state my office and title (calls to my business line). It might be because it's the US Attorneys Office and my title is chief, criminal division, but I'm just guessing <that's sarcasm for those playing along at home> I have to answer all work calls that way since I have no way of knowing what number is calling as they're routed through the central phone system that shows an inside extension. I've found it best not to randomly swear at and/or threaten unknown callers when I receive cold calls like this, though it could be very entertaining to possibly call my boss or a federal judge a scam artist.