oh man this is the holy grail everyone's looking for lol. tbh i haven't seen anything truly amazing that can handle a full conversation without sounding like, clearly an AI. a lot of them nail the voice pretty good now, but the actual dynamic convo part is where they fall apart imo. have you looked into like, elevenlabs for voice gen and then trying to pair it with a strong LLM? still not seamless but maybe better than some purpose-built 'sales AI' tools.