user_query: modify list entries in book wishlsit
response_text: I couldn't find a list called "Book Wishlist."
user_query: make a list called shoppling mall
response_text: Alright, I made a list called "Shopping Mall".
user_query: add shirts and pants and wipes to shopping mall list
response_text: Sure. Those two things on your list called "Shopping Mall". Anything else?
user_query: what is in my shopping mall list
response_text: You have two things on that list.
user_query: tell me what is inside my shopping mall list
response_text: You have two things on that list. They're wipes, shirts and pants.
User: How much did I pay for utilities this month, I mean last month?
Parse: Get_bill ( account_type « utilities » billing_date_span « last month » )