user_query: make a list called safeway
response_text: Sure, I made a list called "Safeway".
user_query: make a list called target
response_text: OK, I made a list called "Target".
user_query: make a list called walmart
response_text: OK, I made a list called "Walmart".
user_query: update my first list
response_text: Do you want to edit the title or an item?
User: Get some hamburgers from Staples.
Parse: Get_product ( product « hamburgers » product_source « Staples » )