Honest question, genuinely curious. Ive never ever seen something that rivals an FAQ, never mind a human.
The best I can seem to find gives a list of clickable links (like a telegram bot) but at that stage its like your designing 1990s WAP pages so may as well just bite the bullet and make it a website.
Helpshift provides chatbots for customer support. We realized a fully automated experience doesn't work, so focus on automating tedius stuff so that the human agent can focus on part which actually require a human agent.