Add a counter in python every time name is written it goes up by 1

I would like the Buyer Number to change every time there is a new buyer

total = 200  # Assigns 200 tickets to variable total
sold = 0  # Assigns 0 tickets to variable sold
count = 0
while sold < total:  # Runs while loop as long as tickets sold is less than total tickets
    remaining = total - sold  # Assigns total - sold to variable remaining
    if sold == 0:  # If tickets are equal to 0
        print("Welcome to Movies4Us!")  # Prints "Welcome to Movies4Us!" if condition above is satisfied
    else:
        print('You are buyer NO.', count + 1, "." "The number of remaining tickets is now", remaining, ".")  # Prints user's number and remaining amount of tickets
    name = input('What is your name?: ')
    tickets = input("How many tickets would you like to purchase?: ")  # Asks user to enter desired amount of tickets to purchase
    try:
        tickets = int(tickets)  # Converts variable tickets to integer type
        if tickets > remaining:  # If user enters more tickets than remaining tickets available
            print("Sorry, there aren't that many tickets available.")  # Prints no more tickets available
        else:
            sold += tickets  # Updates value of variable sold into tickets
            print("You have purchased", tickets, "tickets, Enjoy the movie", name, '!')  # Prints the amount of tickets the user purchased
    except ValueError:  # If user inputs anything except for an integer
        print("Invalid input. Please enter a number.")  # Prints invalid input and asks user to input again
        continue  # Ends current loop and runs the while loop again

print ("There are no more tickets available.")  # If number of tickets reached 0, program ends

Tried adding count = 0 and count + 1

>Solution :

You’ve already initialized a counter: count = 0. You just need to increment it inside the loop whenever a valid ticket purchase is made.

Add count += 1 inside the else block where a valid ticket purchase is made under the statement sold += tickets. This will increment the counter whenever a successful purchase happens.