user_query: Add to list of Favorite Sports Basketball, Table Tennis and Billards. 
response_text: OK. Which list do you want to add to?
user_query: Create a list named Favorite Sports and add to it Basketball, Table Tennis and Billards. 
response_text: Got it, I made a list called "Favorite Sports" and added those three things.
user_query: Clear my Favorite Sports list completely.
response_text: OK. Favorite Sports Basketball, Table Tennis and Billards on your list called "Favorite Sports". Anything else?
User: Check the Apple stock price today.
Parse: Get_security_price ( security_identifier « Apple » security_type « stock » time « today » )