This is a thank-you letter. I phoned you yesterday concerning my little 3-year-old nephew and the problem the family had at their house. You prayed with me. My deepest thanks for the fact that, last night when I went to their house, all felt calm and we were all at peace. The whole family had a peaceful night’s sleep. 
Thank you for returning her phone call and for bringing light back into their lives. God is a good God for He put you in a place where your help to your fellow man will always be appreciated and blessed. All praises to God.