Redis – How to lock seats for a user in a movie ticketing application using Springboot

I am trying to build a movie ticket booking application just to practice for interview low level design perspective.

A theater can have multiple screens and each screen as some seats capacity. A show is a movie which will be shown in a screen.

Below are model/entity classes that I have created.

public class Booking {

    private final String id;
    private final Show show;
    private final List<Seat> seatsBooked;
    private final String user;
    private BookingStatus bookingStatus;
}

public enum BookingStatus {
    Created,
    Confirmed,
    Expired
}

public class Movie {

    private final String id;
    private final String name;

    //Other metadata
}

public class Screen {

    private final String id;
    private final String name;
    private final Theatre theatre;
    //Other screen metadata.

    private final List<Seat> seats;
}

public class Seat {

    private final String id;
    private final int rowNo;
    private final int seatNo;
}

public class Show {

    private final String id;
    private final Movie movie;
    private final Screen screen;
    private final Date startTime;
    private final Integer durationInSeconds;
}

public class Theatre {

    private final String id;
    private final String name;
    private final List<Screen> screens;
    //Other theatre metadata.
}

Refer link for full code and reference – Movie Ticket Booking App

I have not included the getters, setters and some methods in my classes. Here, when a user searches a movie name in the application, then it will be handled by a ShowController.java and it will show some movie shows present in the theaters to the user. And then if a user select a show for a particular theater screen. Then the user will select some seats as per his choice.
Now the problem comes, when one user selects a list of seats then I want to change those seats status to CREATED (enum BookingStatus) and those selected seats must be unavailable to other users.
So, how can I mark those seats as occupied or unavailable to other users as it is a multi-threaded application. And also if the user payment fails or got logged out, how can I unlock those seats so that they got available for other users.

Please provide some code or any useful link how it can be done?.
Is it a good approach to save the status of seats when changed to CREATED in a memory storage like Redis and for seats selected by users we check the status of each seat in Redis whether it is reserved or not. And if booking is successfully done by user then we can mark those seats as permanently reserved in a database.