We're still at the stage of "old school" (pre-ChatGPT) bots, just with higher-quality audio. The other day my wife got a call from someone who sounded like real woman, but reacted just a tad too quickly; I tried a bunch of usual hack to get at the system prompt on her, but the only thing I learned is that it's a keyword-listening bot with a lot of high-quality audio recordings, including plenty of deflecting and reassuring that it is a real human, despite very much not being one.