user_query: Add Rice, egg and cooking oil to my Grocery list.
response_text: Sure, I added Rice, egg and cooking oil.
user_query: Remove Cooking oil and egg from the list.
response_text: I couldn't find those two things.
user_query: Remove Cooking oil and egg from my grocery list.
response_text: I couldn't find those two things on your list called "Grocery."
user_query: Remove egg and Cooking oil from my grocery list.
response_text: I couldn't find those two things on your list called "Grocery."
user_query: Add Rice, egg and cooking oil to my Grocery list.
response_text: Sure. Rice, egg and cooking oil on your list called "Grocery". Anything else?
User: Buy Oriole tickets at Camden Park.
Parse: BuyEventTickets ( event_location « Camden Park » event_performer « Oriole » )