user_query: the customer service nember
response_text: Which would you like?
user_query: Hilton hotels
response_text: I found several choices. Which do you want?
user_query: Hilton customer service
response_text: Who do you wanna call?
user_query: call Hilton Hotels customer service
response_text: Sorry, who do you wanna call?
User: I need to pay the mobile bill.
Parse: Pay_bill ( service_type « mobile » )