Don't throw up a straw man. Don't presume. Just answer the question.
What if there is no god?
When I was 3 my brother got hit on the highway. Broke every bone in his body. Cracked skull, broken femur, face ripped open etc. Me, my mother and two of my cousins were ten feet away and saw the whole thing. Prayer helped me believe my only friend at the time would get better.
When I was 5 I started having really bad panic attacks. Prayer helped calm me down.
In 8th grade my dad left for Iraq. He came home but others weren't so lucky. Prayer got me through it.
Anytime I'm ever afraid, anxious, nervous or whatever, prayer has helped me. I care not if it was nothing more than 'sugar pills.' These things actually happened to me and prayer actually helped. So, so what if he's not real? Did I waste my time praying? You're missing the entire point of 'faith.' Who are you to take that from someone?