Python Basics: Order Chicken

# I'm practicing ordering chicken.
# Order = int("How many would you like to order?" : "))) indicates an identifying error.
# Can't I use the phrase "order"?
# Is it a code problem? Is it a program setting problem?

class SoldOutError(Exception):
    pass

chicken = 10
waiting = 1

while(True):
    try:
    Order = int("How many would you like to order?" : "))
    if Order <= 0:
        raise ValueError
    elif Order >= 10:
        raise SoldoutError
    else:
        print("{0} Chicken Order Completed" {1}Guest"\
            .format(Order, waiting))
        waiting += 1
        Order -= chicken

    if chicken == 0:
        raise SoldOutError
        break        

    except ValueError:
        print("Invalid value entered. Please enter a natural number.")
    except SoldOutError:
        print("No stock available" Thank you.")
        break