Come back home from work, I frequently say "Ok Google, text Mary 'home in 10'", only to be told that it can't do that because it doesn't have a "Home" number fo

Come back home from work, I frequently say "Ok Google, text Mary 'home in 10'", only to be told that it can't do that because it doesn't have a "Home" number for "Mary." I have to re-do it with "Ok Google, text Mary 'I'll be home in 10'", and growl a lot on the inside.