If God is Omniscient (all knowing), He knows all my needs even before I ask Him. Then is not pray redundant? Does prayer change God’s will in anyway? And can prayer change my future?

The Bible assures us that “…your Father knows what you need before you ask Him (St. Matthew 6: 8) But God wants us to know what is good for others and for us – and shun evil. God wants us to desire and yearn deeply what is good for others and for us. Prayer is therefore the training of will to desire the good of all – and turning our will to the spring of all goodness, namely God.
By prayer we become God-like, because communion with God transforms us.
Prayer is not about changing the will of God or the mind of God. In fact, prayer is submitting ourselves to the will of God. The change occurs in our will and mind; that is why a man of prayer is never disappointed. Through prayer, he conditions his mind to accept the will of God. Our heavenly Father, ever loving and merciful, always wills for us what is good, which at times may be difficult to understand.
Prayer is not a monologue or a one-way traffic. It is, in fact, a dynamic dialogue; when you speak, God listens, and God speaks to your heart. Listening to what God has to say is important in prayer. And the perfect model of prayer is the one at Gethsemane. Even under unspeakable agony, Jesus submits to the will of his Father: “Not as I will, but as You will” (Matthew
26: 39).
In prayer, God should come first, others second, and us third. The Lord’s Prayer is the perfect model: His name, His kingdom, His will first. We pray that God’s purposes may be established in the lives of all the people; that evil may be banished from the earth; that all men may live in peace with justice. Then we ask for our daily bread, for forgiveness, and for protection from evil. The first person singular (I, me) is missing in the Lord’s Prayer. We ask all things for ‘us’ – for all men.