I would tell them how grateful you are to have them and that you are honored to be able to share the great news of Jesus with them. Everyones purpose for being there is to lift up his name so don't be so hard on yourself. As long as you do what you can for him he is happy and that is wonderful no matter if you say the same thing every time.. Just trust that he will lead you and you can't go wrong. I hope this helps
