I AM not able to loop if ticket asked is more

TICKET_PRICE = 10
import sys

tickets_remaing = 100
while tickets_remaing >= 1:
    # output how many tickets are remaining using the tickets_remaining varaiable

    print('The Number of Ticket Remaning is {}'.format(tickets_remaing))

#aking user name and asking them for ticktes they need

    asking_name = input('What is Your Good Name: ')
    print('Hi {}'.format(asking_name))
    try:
        need_ticket = int(input('Number of Ticket Do You Want: '))
        if need_ticket > tickets_remaing:
            raise ValueError('sorry we do not have sufficient ticket {}'.format(tickets_remaing))
    except ValueError as err:
        print('Oops please type the numbers and try again: ')

#calculate and tell totla price of tickets

        calculate = int(TICKET_PRICE * need_ticket)

        print('Totla price of Your ticket is ${}'.format(calculate))

#we need user to ask did they want to proceed or not mean y/n

        asking_proceed = input('Did You Want To Proceed if yes press "y" if not press "n": ')

        if asking_proceed.lower() == ('y'):
            print('\n                    S O L D ! ! !              ')
            print('\n            Thanks for Purchasing  {}'.format(asking_name))
        tickets_remaing -= need_ticket
sys.exit('\n          sorry all ticket has been s o l d !!!!               ')