user_query: Create a shopping list and add jacket, pants to the list
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: yes
response_text: Alright, I made a list called "Shopping" and added jacket, pants.
User: cancel the taxi to the bus station for 9 am
Parse: Cancel_ride ( dropoff_location « bus station » pickup_time « 9 am » )