user_query: Create a grocery list and add towel, soap, shampoo, toothpaste, brush to the list
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: yes
response_text: OK, I made a list called "Grocery" and added those four things.
User: Show me how much I um owe in PDF
Parse: Get_bill ( document_format « PDF » )