Multi Threading JAVA

import java.util.Scanner;

class TicketCounter {
    private int AvailableSeat = 50;

    public void bookTicket(String CustomerName, int NumberOfSeat) {
        if((AvailableSeat >= NumberOfSeat) && (NumberOfSeat > 0)) {
            System.out.println("Hi, " + CustomerName + " : " + NumberOfSeat + " Seats booked Successfully..");
            AvailableSeat = AvailableSeat - NumberOfSeat;
        }

        else {
            System.out.println("Hi, " + CustomerName + " : Seats Not Available");
        }
    }
}

class TicketBooking extends Thread {
    private TicketCounter ticketCounter;
    private String CustomerName;
    private int NumberOfSeatsToBook;

    public TicketBooking(TicketCounter ticketCounter, String CustomerName, int NumberOfSeatsToBook) {
        this.ticketCounter = ticketCounter;
        this.CustomerName = CustomerName;
        this.NumberOfSeatsToBook = NumberOfSeatsToBook;
    }

    public void run() {
        ticketCounter.bookTicket(CustomerName, NumberOfSeatsToBook);
    }
}

public class MultiThreading {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.print("Passenger Name : ");
        String CustomerName = input.nextLine();

        System.out.print("Number Of Seats : ");
        int numberOfSeat = input.nextInt();

        System.out.print("\nPassenger Name : ");
        input.nextLine();
        String PassengerName = input.nextLine();

        System.out.print("Number of Seats : ");
        int NumberOfSeat = input.nextInt();

        System.out.println();

        TicketCounter ticketCounter = new TicketCounter();
        TicketBooking ticket1 = new TicketBooking(ticketCounter, CustomerName, numberOfSeat);
        TicketBooking ticket2 = new TicketBooking(ticketCounter, PassengerName, NumberOfSeat);

        ticket1.start();
        ticket2.start();
    }
}