conversations.from: human
conversations.value: Jonathan eats 2500 calories every day except for Saturday, when he consumes an extra 1000 calories.  He burns 3000 calories every day.  What is his weekly caloric deficit?
  Solve it.
conversations.from: assistant
conversations.value: He consumes 2500+1000=3500 calories on Saturday
  He consumes 2500*6+3500=18500 calories in the week.
  He burns 3000*7=21000 calories in the week
  His caloric deficit is 21000-18500=2500 calories per week