introduce <player1> <player2>
you see: You introduce <player1> to <player2>
they see: Val introduces you to <player1/2>.
others see: Val introduces <player1> to <player2>.
alternatively could be something like:
Val says '<player1> this is <player2>, <player2> this is <player1>'
they would see: You shake <player1/2>'s hand as Val introduces you.
you and others would see: <player1> and <player2> meet and shake hands
would be nice to be able to introduce people

Val