user_query: No, it doesn't need a time. Just add it to my to do list.
response_text: Sorry, should I add a time to your task?
user_query: Set a task called clean the garage.
response_text: Got it, do you want to add time?
User: i want to see my delivery bill for last week no last two weeks
Parse: Get_bill ( account_type « delivery » billing_date_span « last two weeks » )