user_query: Add Blade to the list.
response_text: Alright. Which list do you want to add to?
user_query: Music
response_text: OK. Which list do you want to add to?
user_query: Music
response_text: OK. Which list do you want to add to?
user_query: Music list
response_text: What do you want to add?
User: Show me the last three PDF statements from my credit card bill.
Parse: Get_bill ( account_type « credit card » billing_cycle « last three » document_format « PDF » )