Are there plans to back up the "suggested answer", which I presume is LLM generated, by a definitive source? The first question in the demo returned the relevant document you were looking for, but I didn't see this in the search results for the second question.
I'm not sure I would trust a system like this unless I could click through and see the source of the answer I'm reading, and make sure that the LLM is referencing the correct email/document.
This seems to be a common growing pain in places where an AI model is expected to provide authoritative answers - I wonder if (at least in your case) it's possible to use a more traditional fuzzy search algorithm to attempt to find the source, based on the LLM's answer string.