def describe_pet(pet_name, animal_type='dog'):
    """Display animal type"""
    print(f'\nI have a {animal_type}.')
    print(f"My {animal_type}'s name is {pet_name.title()}.")





# describe_pet('Human', 'ali')
# describe_pet('dog', 'willie')
# describe_pet(pet_name='ahmed')
describe_pet('david')
describe_pet(pet_name='harry', animal_type='hamster')