Prayer is a conversation between you and the Divine and it is more than words. It is the connection of your soul to the force that is responsible for all things. You have your own free will to connect or not. I can’t promise you that if you connect with God your life will be peaceful and complete. However, your soul will be at peace in the chaos of this world.
We are not guaranteed all our wants will be filled. Not everything is meant for us. What we are promised is life and love.