TASK DEFINITION: In this task, you have given an input which is user's command or question, based on that you have to return what will be Agent's response/reply for that particular user's command or question
PROBLEM: who is the manager of sarah?

SOLUTION: I didn't find anyone named sarah in your address book.

PROBLEM: What is going on for tomorrow?

SOLUTION: I didn't find any events tomorrow.

PROBLEM: Ok, what is at the end of my day on the 3rd?

SOLUTION:
The last event on Saturday is "last" from 10:00 to 10:30 PM.