user_query: add situps to my workout list
response_text: I couldn't find a list called "Workout." Do you want me to make one?
user_query: on second thought, cancel that addition
response_text: No problem, nothing's been changed.
User: What's in the email, no, text from mom from Saturday.
Parse: Get_message_content ( message Electronic_message ( date « Saturday » medium « text » sender Personal_contact ( person « mom » ) ) )