user_query: check playoff tree on sports list
response_text: Which list?
user_query: check it off
response_text: Which list?
user_query: sports
response_text: OK, I added playoff tree.
user_query: add playoff tree to my list
response_text: OK. Which list do you want to add to?
User: Can we check Amazon's stock prices for this month?
Parse: Get_security_price ( security_identifier « Amazon » security_type « stock » time « this month » )