What is a voice agent?

The same idea as a chatbot, on a call. It answers, understands what the caller wants, handles the routine part and hands over to a person when it should. Everything true of chat applies with less margin, because a caller cannot scroll back, cannot re-read, and is far less forgiving of a confident wrong answer. Worth building where calls go unanswered at predictable times, which for most businesses is lunch, evenings and the middle of a job.