user_query: Add ice cream to my list.
response_text: OK. Which list do you want to add to?
user_query: Add to the Grocery list.
response_text: Alright, I added ice cream.
User: Compose an audio message and send it to grandma, no, grandpa.
Parse: Send_digital_object ( format « audio » medium « message » recipient Personal_contact ( person « grandpa » ) )