input: Write a python function to create an instance of the Person class and call the say_hello method.
  assert create_and_greet_person("Alice", 30) == "Hello, my name is Alice and I am 30 years old"
  assert create_and_greet_person("Bob", 25) == "Hello, my name is Bob and I am 25 years old"
  assert create_and_greet_person("Charlie", 40) == "Hello, my name is Charlie and I am 40 years old"
output: class Person:
      def __init__(self, name, age):
          self.name = name
          self.age = age
  
      def say_hello(self):
          return f"Hello, my name is {self.name} and I am {self.age} years old"
  
  def create_and_greet_person(name, age):
      person = Person(name, age)
      return person.say_hello()