TICKET_PRICE = 10
tickets_remaining = 100
service_charge = 2

def tickets():
  global tickets_requested
  try:
    tickets_requested = int(input("Hello {}, I'm glad your interested in our show!  How many tickets would you like to reserve?   ".format(name)))
  except ValueError:
    print("please use Numerics")
  else:
    if tickets_requested == 0:
      print("Congratulations! {}, it seems you already have all the tickets you need.  Have a nice day!".format(name))
    elif tickets_requested <= tickets_remaining:
      global total
      total = (tickets_requested * TICKET_PRICE) + service_charge
      confirm()
    else:
      print("I'm sorry {}, we don't have that many tickets on hand, lets go back & try again!".format(name))
      tickets()

def confirm():
  confirmation = input("Your total will be ${}.00,counting a ${}.00 service charge would you like to proceed?   ".format(total, service_charge))
  if confirmation == "Yes" or confirmation == "yes" or confirmation == "Y" or confirmation == "y":
    print("Thank you {}, for purchasing tickets to our show".format(name))
  else:
    print("I'm sorry {}, we must have made a mistake, let's try this again".format(name))

while tickets_remaining:
    print("There are {} tickets remaining".format(tickets_remaining))
    name = input("Who's name shall this ticket be under?   ")
    tickets()
    tickets_remaining -= tickets_requested
print("I'm sorry but all tickets have been purchased, we hope you will see our other showings!")