Before he had finished praying, Rebekah came out with her jar on her shoulder.Genesis 24:15
Abraham's servant is sent on a mission to find Isaac a wife. He prays a very specific prayer. Before he finished speaking, God answered his prayer.
God is a God of the big picture and the details. My prayers are not insignificant, he delights to answer them. The answer may already be in motion before the words have left my lips.
I should not be scared of praying in detail. Yes, God's will we be done. Yes, he knows what is best. But why not pray in detail? He can, and does answer. It is like a child asking for a very specific ice cream - a loving father delights to answer that request.