Optional
I only use these voice commands for making phone calls in the car.
I had to make an alias for my wife as every time I tried calling her by name the phone tried to dial the chap I bought my car from
So I now say "call my wife" and that seems to work. Not bothered with them for anything as if they cannot be relied upon to make a phone call on a phone then more complex tasks would just add to my level of frustration