Asking for healing isn’t the prayer of faith rather, acting on your belief in the word by saying the exact word of God is. Faith is believing and acting on the word of God.
Prayer is a reverential communication with God. This is different from how you communicate with your friends or earthly parents. It is done reverentially, with a knowledge of who God is.
God does not work by feelings but by authority and power. Whatever God says is, is. There’s not room for negotiation as His word is law. That’s exactly what you will achieve when you also function like God by imitating Him. Hallelujah!