user_query: go ahead and create a camp list for me
response_text: Sure, I made a list called "Camp".
user_query: add tent, chair, firewood, marshmallow and tuna 
response_text: Got it. Tent, chair, firewood, marshmallow and tuna on your list called "Camp". Anything else?
user_query: Camp list
response_text: What do you want to add?
User: I want to get some queen-sized sheets from Bed Bath & Beyond.
Parse: Get_product ( product « some queen-sized sheets » product_source « Bed Bath & Beyond » )