At the moment, if you have several uses in the household and you want separate functions e.g. diaries or music collections, you have to switch household user accounts which is quiet cumbersome.
There is work going on in recognising individuals voices but i think there is a much simpler idea ... Using different wake words.
So i can say "alexa what's going on today"
And my partner can say "john what's going on today"
And there is enough information to direct the search to the correct diary.
I suspect this idea is patentable but I've not the time to go through the process and would really appreciate the feature.
So the best way for me is to put it in the public domain for anyone to use.