Praying is speaking with God, no more, no less. He knows you. It's not the words that matter, but what you believe in your heart. An example of such a prayer:

"Lord Jesus, I need You. I know I've been arrogant and disobedient. I open the door of my life and accept You as my Saviour and Lord. Thank You for forgiving my sins. Please, lead me from now on. Change me, so I'll become the person You want me to be. Thank You for hearing me and for answering my prayer by entering into my life. Amen."

Does this prayer reflect what's in your heart? If so, pray this prayer and trust in Gods promise. Jesus Christ will come into your life.