Prayer is a conversation—a conversation with the Creator of the Universe, but a conversation nonetheless. When you are faced with decisions, however big or small, God wants to talk with you about them. How else are we supposed to grow in relationship with God other than talking through our thoughts and feelings with Him? God put that brain in your head and it is weighing all those scenarios. Your faculty of reason is one way in which God talks to you. Another way He talks to you is through your desires and longings.
Take delight in the Lord, and He will give you the desires of your heart .