Timetable - 24hr type - booking hours conflicts for one worker from many.

Hello everyone!

For a few weeks now I have been struggling and torturing myself with a very difficult problem.
There is very little about it on internet and if there is - it is not the relevant one... I couldn't find it at least...

My problems basically is:
The business sends workers to many different addresses through out the day.
There are many workers.
Jobs are limited by time (start and end).
The schedule is done for a few days ahead.

However:
If one or more of the jobs given to the same worker on one day overlap/conflict with each other I need it to highlight those addresses.

A little explanation
I know we can manually notice those overlaps by using of the table filters but that is not the type of solution that I am looking for.

I have attached a picture with a prototype of this type of a problem:
QUESTION ON INTERNET.JPG