Oh , dear . My weight has gone up again .   I'm not surprised . You eat too much .   And I suppose sitting at a desk all day at the office doesn't help .   Yes , I think so .   I do wish I could lose weight   Well , why don't you go on a diet ?   I've tried diets before but they've never worked .   Perhaps you should exercise more . Why don't you go to an exercise class ?   Yes , maybe I should . 