We pray because we trust God. Whatever we pray for, we are believing that God will answer our prayers. Yes he will answer our prayer because we have the confidence to ask God for what we need according to his will. 1 John 5:14 says "And this is the confidence that we have in him, that, if we ask anything according to his will, he hearth us". Whatever you ask for, God hears you and he will answer your prayers.