Need someone to help finish this task in the comments

Question

https://code.sololearn.com/crlmQOJ4eAeS/?ref=app

Answer 1

please describe what it is and how it will work so we can help you!

Answer 2

Always describe your question accurately. 50% of the answer is already solved, if you can write your problem correctly.

Answer 3

Thank u all for your advice my subject is how to booking a ticket plan and my problem is
1- how to change the seat when the client asking to change .
2-the verification if the seat is available .
3- if the seat changed must to be changed in data of ticket .
I hope you understand i am sorry the is task with franch