My coffee bot I created for Codecademy

coffeebot.py

# Define your functions
def coffee_bot():
  print("Welcome to the cafe!")
  size=get_size()
  drink_type=get_drink_type()
  temp=hot_or_iced()
  print("Alright, that\'s one {} {} {}!".format(temp,size,drink_type))
  name=input("May I have your name please? ")
  print("Thanks, {}! Your drink will be ready shortly.".format(name))

  
def get_size():
  res = input('What size drink would you like? \n[a] Small \n[b] Medium \n[c] Large \n')
  if res == 'a':
    return 'small'
  elif res == 'b':
    return 'medium'
  elif res == 'c':
    return 'large'
  else:
    print_message()
    return get_size()

def print_message():
  print("I'm sorry, I did not understand your selection. Please enter the corresponding letter for your response.")

def get_drink_type():
  res = input('What type of drink would you like? \n[a] Brewed Coffee \n[b] Mocha \n[c] Latte \n')
  if res == 'a':
    return "brewed coffee"
  elif res == 'b':
    return "mocha"
  elif res == 'c':
    return order_latte()
  else:
    print_message()
    return get_drink_type()

def order_latte():
  res = input('What kind of milk would you like in your latte? \n[a] 2% milk \n[b] Non-fat milk \n[c] Soy milk \n')
  if res == 'a':
    return "latte"
  elif res == 'b':
    return "non-fat latte"
  elif res == 'c':
    return "soy latte"
  else:
    print_message()
    return order_latte()

def hot_or_iced():
  res=input("Would you like your drink hot or iced? \n[a] Hot \n[b] Iced \n")
  if res == "a":
    return "hot"
  elif res == "b":
    return "iced"
  else:
    print_message()
    return hot_or_iced()

# Call coffee_bot()!
coffee_bot()