user_query: add chocolate to Valentine's Day list
response_text: I couldn't find a list called "Valentine's Day." Do you want me to make one?
user_query: yes
response_text: Sure, I made a list called "Valentine's Day" and added chocolate.
user_query: you know what take chocolate off that list and put it on anniversary list instead
response_text: I couldn't find a list called "Anniversary."
User: How did Samsung do in umm August last year?
Parse: Get_security_price ( security_identifier « Samsung » time « August last year » )