user_query: create a beach list
response_text: Sure, I made a list called "Beach".
user_query: add chair
response_text: Sure. Chair on your list called "Beach". Anything else?
user_query: add towel
response_text: Got it. Towel. Anything else?
User: Show me the message Mike gave me on Thursday.
Parse: Get_message_content ( message Electronic_message ( date « Thursday » medium « message » sender Personal_contact ( person « Mike » ) ) modality « Show » )