Siri is terrible.
"Call mom" sometimes calls my mom, who is in my favorites (I have 4 people in favorites: mom, wife, daughter, brother).
Sometimes it decides to call "wife's mom"
Sometimes it says "which mom" then lists "mom, wife's mom"
Mom, literally the word mom, is in my favorites. I use it almost daily.
And yet, Siri doesn't remember this, doesn't create relevancy, it doesn't even decide "Let's look at Favorites first".
:/