user_query: create a list named Things for the party
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: Add pears and bananas on it
response_text: Got it, I added pears and bananas.
user_query: berries
response_text: Alright, I made a list called "Berries".
user_query: Salad 
response_text: Alright, what do you want to call it?
user_query: chicken wings
response_text: Got it, I made a list called "Chicken Wings" and added Salad.
User: Order the salted whole cashews from Amazon using my credit card.
Parse: Get_product ( payment_method « credit card » product « salted whole cashews » product_source « Amazon » )