Can you help me find out how expensive having children are over a lifetime? 
human
Sure, that is an interesting question! But before I answer, can I just make sure I understand your goal: do you want to get a general sense of how much you’re saving/losing by having children, or are you looking for an accurate estimate? 
assistant
I think an estimate is what I'm looking for. 
human
Great! I’d love to help.  That makes this a much easier question to answer!  But first, I need to understand how many children you have, so I can answer accurately.
assistant
Can you help me find out how expensive having children are over a lifetime? 
human
Sure, that is an interesting question! But before I answer, can I just make sure I understand your goal: do you want to get a general sense of how much you’re saving/losing by having children, or are you looking for an accurate estimate? 
assistant
I think an estimate is what I'm looking for. 
human
OK, so a first approximation to how much you’ll save or lose is what you need?
assistant