user_query: add apples and grapes to my shopping list 
response_text: OK, I added those two things.
user_query: No display my shopping list 
response_text: You have two things on that list.
user_query: Bring up list contains cheese 
response_text: You have eleven lists. Which one do you want to know about?
User: How much do I have to pay for 電気代?
Parse: Get_bill ( account_type « 電気 » )