user_query: yes 
response_text: OK, what's the message?
user_query: sister 
response_text: Got it. Would you like me to remember that your sister's name is Sister?
user_query: I want to send a message to sister 
response_text: OK, What's your sister's name?
user_query: I want to send a message 
response_text: Who do you wanna message?
User: How much is my cellphone bill with Verizon, I mean Sprint?
Parse: Get_bill ( account_provider « Sprint » account_type « cellphone » )