chat_history: ['My brother went on a low-calorie diet and began shaking everyday.', 'Poor thing!  Is he felling better now?  I hope he quit that diet.', 'He quit the diet a while ago as recommended by his doctor. I was a little scared but I knew it was just side effects of a bad diet.']
sys_response: Thank god he is ok.  There are very dangerous diets around, better be guided by his doctor.
situation: My brother went on a low-calorie diet and began shaking everyday. I was a little scared for him, but I knew he'd be fine once he changed his diet to a proper one as the doctor recommended him to.