Shipping windows, return windows, sizing, stock, and where an order is. That is most of a store's support volume, and almost all of it is already written down somewhere on your site.
Train one on your site, freeThe agent answers from your pages and cites them. When something is wrong you can see which page taught it that, which turns an argument about the bot into a five-minute content fix.
And when retrieval is too weak to be sure, it says so instead of filling the gap with something that sounds right.