What is the polite way to say that I have been helped in shop?
Let's say I am in a shop, an assistant helped me, then he/she went away for other stuffs, maybe he/she was checking the inventory for me, or maybe I don't have any further questions and I just want to look around. Then another assistant come to me and ask if I need help. Most of time in I just say "No thank you." But I think there should be a more polite way to say that some one else already helped me, I am just waiting for him/her or I don't need further help. So in this kind of situation what should I say?