user_query: Could you create a list for me
response_text: Alright, what do you want to call it?
user_query: Costco
response_text: Sure, I made a list called "Costco".
user_query: Add toothpaste, mouthwash, laundry detergent, soap, hand sanitizer, fruit, frozen berries and corn on it.
response_text: OK. Those four things on your list called "Costco". Anything else?
user_query: yes 
response_text: What did you want to add?
user_query: paper towels and tissues
response_text: Sure. Paper towels and tissues. Anything else?
User: Show me the ending price for Apple yesterday I mean today.
Parse: Get_security_price ( price_type « ending » security_identifier « Apple » time « today » )