user_query: add wash do to my to-do list 
response_text: Sure, I added wash do.
user_query: display my to-do list 
response_text: You have one thing on that list.
user_query: Get my recent to-do list 
response_text: You have one thing on that list.
User: Show the message it says, uh, dog vet appointment.
Parse: Get_message_content ( message Electronic_message ( content « dog vet appointment » medium « message » ) modality « Show » )