Three AI technologies that could make chatbots intelligent

Chatbots have the potential to be amazing. The Star Trek computer seemed like it was finally becoming a reality. So far, we've been let down. Most chatbots are rubbish and it's the tools that are to blame. If I want to build a chatbot with some semblance of intelligence I have to design for a myriad of possibilities. Surely this is what AI should be doing for me?