Pay Attention If You Want Me To Help You!

At work I am pretty patient but, it only lasts just so long then I actually say can you just pay attention for a second? Or can u just listen to my answer before you ask another question? And other times I just want to wave my hand in front of their face because they zone out while asking a question or during my trying to help them. Very strange. I don't have an hour and a half to figure out the product you are looking for, so PAY ATTENTION!