Psalms 4:1 Hear me when I call, O God of my righteousness: you have enlarged me when I was in distress; have mercy on me, and hear my prayer.
Colossians 4:2 Continue in prayer, and watch in the same with thanksgiving;
1 Thessalonians 5:17 Pray without ceasing.
It is okay to ask for things when you pray however God knows your needs, acknowledge him and praise him at all times. You will find that favor finds you.