An atheist will go around his whole life denouncing God or claim God does not exist, but I feel that when it all comes down to it, and you are on your death bed, and you are taking your last breath, I think that will change at that moment for you.
Who knows what their, or anyone else's last thoughts will be?
Will you at that moment look to God, and maybe ask Him something?
No - I doubt it. If any god exists then either I'm about to meet him or I'm not. If I am, I'll save any requests until then - if I don't meet any deity I'll scope out any afterlife scenario, learn about it. And hey - if anyone knows how to talk to the chief deity I'll probably ask something. Depends on what his reputation is really. If he operates an open door policy I'll have to give it a go - but if he's a horrid sadistic bully I probably won't bother.
You know, the one that doesn't exist?
I won't be asking any god that doesn't exist anything...it would take up far too much time and I'll be dead before I'd gotten through the first tenth of the list of proposed gods, without getting to the philosophically possible ones.