A： Linda, would you care for some candies or cookies?
B： No, don't try to tempt me. I'm becoming chubby, and I have to slender down.
A： You are not really chubby. You are actually thin enough.
B： I don't think so. I know I've put on weight this winter.
A： So you are watching your weight, aren't you?
B： Yes, to tell you the truth. I am on the diet.