Prayer is not about overcoming God's reluctance, but about laying hold of his willingness. God's willingness to heal is seen in His Word.
Begin reading the scriptures regarding the present need. Read them out loud, so that your eyes see them, your mouth will speak them, and your ears can hear them; then your minds can perceive them. Keep reading them, letting them penetrate into your heart and into your spirit.
"Faith comes by hearing and hearing by the Word of God"
Romans 10:17
Ask the Holy Spirit to make these words alive inside you. Then you will be able to speak them out by faith.
Jesus said that the mouth speaks out of the abundance of the heart.