user_query: Check off two items on the grocery list
response_text: Which item?
user_query: actually check off two items on the 
response_text: Are you sure you want to go ahead and clear it?
user_query: Add two items to the grocery list
response_text: What do you want to add?
User: Please record my hike for 2 hours?
Parse: Log_exercise ( activity « hike » duration « 2 hours » )