Acceleration problem on 2010 Chevrolet Aveo5

Have had the car for over a year. Starts out good but at times the car seems to loose power. You step on the gas and nothing... then it seems to kick in. If you take your foot off the gas and apply again slowly it will go.

Asked by for the 2010 Chevrolet Aveo5
it's still in factory warranty; take it back to the dealer.