Prayer doesn't change God. It changes the one who prays to Him. [Spirituality & Religion]
His prayer line is open 24/7 with no waiting, and the line is never busy. How he answers, depends on many things, but largely your attitude and motive. If you call on him only for emergencies, then ignore him the rest of the week, it's doubtful you'll get through. He doesn't talk to strangers, but if you're interested, and will take the time to get acquainted, he's all ears. Again...check your motive. If you go to church on Sunday, but live like the devil the rest of the week, you're not wanting a relationship. You're wanting a cosmic genie.