user_query: Add Watermelon, Avocado and Melon on my Fruits list.
response_text: I couldn't find a list called "Fruits." Do you want me to make one?
user_query: Yes
response_text: Alright, I made a list called "Fruits" and added those two things.
User: put eggs on my grocery list
Parse: Add_item_to_list ( items « eggs » list_label « grocery » list_singular_or_plural « list » )