That would be one incredibly expensive Q&A system. As rightly suggested by others, some search + a finetuned Q&A system is what you need.

I've been building a library that makes solving tasks like conversational Q&A easy.

https://github.com/backprop-ai/backprop

If you need some pointers, we have example notebooks and I'm happy to chat about it as well. Would love to know if it helps!