The space seems saturated and a bit confused. Sierra.ai comes to mind. I have tried building a product around this need myself (tiptap.chat) but it's taking a bunch of marketing to convince people. IMHO having a sufficiently context-rich bot like this on any resource-heavy website or service is a net-win. But the procedural chatbot era of the last ten years – those little annoying bubbles in the bottom right corner – has soured peoples' perceptions. :/

Best of luck if you try building something!