user_query: add potatoes to my list
response_text: Alright, I added potatoes.
user_query: I want to view my shopping list
response_text: You have two things on that list.
user_query: bring up my shopping list
response_text: You have two things on that list.
User: Check on my Microsoft stocks.
Parse: Get_security_price ( security_identifier « Microsoft » security_type « stocks » )