user_query: I'm wanting to add note cards to my shopping list
response_text: OK. Which list do you want to add to?
user_query: shopping
response_text: What do you want to add?
user_query: note cards
response_text: What do you want to add?
User: On Ameritrade, find the uh price of Apple stock.
Parse: Get_security_price ( provider « Ameritrade » security_identifier « Apple » security_type « stock » )