I'm in a party with this Japanese fellow, and every time a new member joins, he says
{Hello!}{If you would be so kind.}

Could someone give a better/different translation of what the "If you would be so kind" text means to the JP? I've never found a use for "If you would be so kind", and it doesn't make much sense in this context, so I'm curious what this guy thinks he's saying. Perhaps there's a more clear way to translate it? Or maybe it's just one of those expressions that simply doesn't make much sense in English?