user_query: add to packing lis
response_text: What do you want to add?
user_query: oops, add to shopping list instead
response_text: You have two items on that list. Which one do you want to edit?
user_query: just add something
response_text: What do you want to add?
User: Get my uhh new audio message from Dan.
Parse: Get_message_content ( message Electronic_message ( format « audio » label « new » medium « message » sender Personal_contact ( person « Dan » ) ) )