How about this:
You: I'm glad you asked this question K. Let's turn to Matther Chaper 26 vs, 27 for the answer:
And taking a cup, he offered thanks and gave it to them, saying: “Drink out of it, all of you, for this means my ‘blood of the covenant, which is to be poured out in behalf of many for forgiveness of sins.
Jehovah's Witnesses show their support for Jesus by reading this scripture each Memorial. It clearly shows how that our forgiveness of sins is inextricably linked to membership in the New Covanant. The Watchtower teaches that the eight man governing body leading our organization have their sins forgiven by their membership in the New Covenant.
Her: Wow. That is so loving! But how can I personally benefit?
You: Well, we as rank and file members receive benefits and are given the priviledge of working for our salvation under their blessed direction. We have hope that one day we will be declared righteous if we remain in good standing with the elders.
Her: Where is that in the bible?
You: Well, I can see that our time is just about up. I think you can see that JW's really do believe in Jesus after all. We will pick this up again next week when we discuss what happens to those who end up at the Great White Throne Judgment without a Mediator. Whew!...Seems to be getting a little hot in here. See you next week!