I have been using the Pandorabot plugin with some success. It is dated though and based on the old Alicebot I believe which is about 15 years old by the looks of the files it accesses.
The site has moved on and we are using a backdoor to access now. They have implemented AIML 2.0 which is greatly superior and the website interface has been substantially improved.
Is there any intent to upgrade this plugin? I can't imagine them maintaining the old site forever.
I use this functionality constantly. After reading the Google AI tutorials I am seeing this is not the chatbot solution. I believe the solution is out there, The plugin just needs updated to access it.