The Gospels are not a transcript of a live recorded conversation. The Gospels are the Good News that God so loved the world, and once we are in the world than God so loved us, you, me all of us without exception that it is not important of what Peter actually said. What is important is that Peter repented and Jesus forgave, that is fore gave him the status of a son of God, and that we should not keep back when we sin. None of us is secure from sinning we all fall short of our promise not to sin again, but like Peter we must seek forgiveness and not despair like Judas. We must also help others to return to Jesus for forgiveness. Just know this that when Jesus went to heaven on that same day after Calvary, the first person to enter heaven was the ‘Good Thief’ and not a saint.