Sure. But one can also have both and not get either a response at all or the response one wants or expects. Petitionary prayer is a tough one. I think it is the hardest prayer to understand. Lewis was the first one that helped me think it through so that my expectations and motives make more sense, learning to take the answers, and even non-answers, faithfully. Just because I did not get an answer, or the answer I wanted, did not mean I lacked faith.