user_query: Create To-Do list.
response_text: Sorry, it looks like you already have a list with that name. Do you still want to make a new one?
user_query: yes
response_text: Got it, I made a list called "To-Do".
user_query: Add to the list eat breakfast and wash dishes.
response_text: Sure. Those two things on your list called "To-Do". Anything else?
user_query: To-Do list
response_text: You have three lists with similar names. Which one do you want to know about?
user_query: ok. I want to add task to my to-do list.
response_text: What did you want to add?
User: Show the bill from last month, wait, this month.
Parse: Get_bill ( billing_date_span « this month » )