user_query: add green peppers to my shopping list 
response_text: Alright, I added green peppers.
user_query: display my shopping list 
response_text: You have two things on that list.
user_query: get my shopping list 
response_text: You have two things on that list.
User: How much was my T-mobile bill last billing cycle, sorry last month?
Parse: Get_bill ( account_provider « T-mobile » billing_date_span « last month » )