"This is probably a little unprofessional, but I've been working on this prayer for a really long time and, well... would you mind if I prayed it for you?"
I smiled and bowed my head, not sure what to expect. We had already established in conversation that the waiter was a Lutheran, and he had already asked repeatedly to pray with my friends and I who were out to lunch. It would've been rude to say no at this point.
We pray because we can, and because we have a Father who can't wait to give us good gifts. He hasn't kept any good thing from us and has even given the life of His own Son for our sakes. He doesn't need our prayers to know what's going on in our lives, our fears, our joys, our needs, etc. He's God and knows all that stuff already. He knows far better than we could possibly imagine what we truly need even without our prayer, but because He's our Father, we can ask for the things we think we need too.