Actually, I think you might need to study a bit more about how AI works; it’s very important to know exactly what it does, how, and also… what it cannot do ?? Have a look here: https://beta.openai.com/docs/guides/completion/prompt-design.
You can’t really “update” the model used by the AI, it’s as it is; you can train it to behave in a different way, with different data, but that involves a lot of work.
The answers given by the AI are hallucinated (https://en.wikipedia.org/wiki/Hallucination_(artificial_intelligence)) and they aren’t really based on facts.
A law bot would be certainly very interested to do; but at this point, I think using the davinci model is the best way, with a good prompt. In the prompt (what you define as “context” in the chatbot of AI Engine), you need to add: If you don’t know the answer, say “I don’t know”. By adding this, you remove a potential issue, but that will not make it perfect.