user_query: add cheese to my shopping list 
response_text: OK, I added cheese.
user_query: add to my shopping list 
response_text: You have two things on that list.
user_query: get my most recent list 
response_text: You have eleven lists. Which one do you want to know about?
user_query: Pull up my lists 
response_text: You have quite a few lists.
User: Show me the price of TSLA yeah TSLA today.
Parse: Get_security_price ( security_identifier « TSLA » time « today » )