user_query: Add cellphone, power bank and headset to my Shopping list. 
response_text: Got it, I added cellphone, power bank and headset.
user_query: Remove headset from the list.
response_text: I couldn't find headset.
user_query: Remove headset from my Shopping list.
response_text: I couldn't find headset on your list called "Shopping."
user_query: Remove power bank from my Shopping list.
response_text: I couldn't find power bank on your list called "Shopping."
User: In 20 minutes, resume my yoga session, I mean 15 minutes
Parse: Resume_exercise ( activity « yoga » time « 15 minutes » )