Notification for when Friend gets out of match

It would be really cool if RIOT could allow a button next to a person's name on your friends list who is currently in a match. When you click the button, it will "tag" that person, and when the game finishes, you will be pinged or given a notification that the person is out of their game. This will keep people who are waiting for a friend to Finnish their game from constantly checking their friends list to see if they are done or not. In addition to or instead of, it would be cool if there was a way to ping your FRIEND when THEY get outa game to let them know that your waiting for them! like it would give them a notifcation "JeffreySkMu waited for you to get out of ur match to play with you" or something like that, so that if ur on the crapper, the opprotunity wont be missed