Wed 08:00 PM
Lesson 1
Fri 08:00 PM 
Lesson 2
Sun 08:00 PM
Lesson 3
Now parent also  made reservation for Lesson 1 
Because deadline for reserving also for Lesson 1 still didnt end up.
Now for this week parent has also chance to reserve for Lesson 3 as credits logic but lets assume that deadline ended. so parent should just start reserving for the next week for the lessons 
Lesson 4, Lesson 5 and Lesson 6
So when new week comes