user_query: Add okra, pipino and tomato to my Grocery list.
response_text: I couldn't find a list called "Grocery." Do you want me to make one?
user_query: yes
response_text: Alright, I made a list called "Grocery" and added those two things.
user_query: Delete okra from the list.
response_text: I couldn't find okra.
User: Let's use Robinhood to check um stock prices.
Parse: Get_security_price ( provider « Robinhood » security_type « stock » )