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: what about May 21?

SOLUTION: I found one event on Thursday the 21st. It's "Let's Run" from 9:00 AM to 9:30.

PROBLEM: remove the event for 23rd from the callender

SOLUTION: I didn't find any events on Tuesday the 23rd.

PROBLEM: who have not accepted to birthday party

SOLUTION:
Here is the list of attendees who have not accepted "Birthday Party": you and Jake Cobb. Unfortunately, Jake Cobb declined.