Is there free simple AI software out there?

I'm looking for a simple piece of software that allows me to, just using text, ask someone a question and, based off of their answer to that question, ask the next one. I thought about doing this by hyperlinking Word documents together, but I was hoping for something that was a little quicker to load so this could be almost instantaneous. Calling it AI is a little generous, but I didn't really know what else to call it. Thanks! =)