This is exactly what it does, no? The product explicitly is about taking your notes that you write and being able to discuss those notes with the AI. It's in all of the screenshots and the description.

I mean I would take AI autocomplete in the style of copilot. That feels conversational enough already, it would be even better if it’s optimised for prose instead of code. The MS word autocomplete is getting pretty good and I would love more of it personally.