python
class Person:
def __init__(self, name, age):
self.name = name
self.age = age
def say_hello(self):
print(f"Hello, my name is {self.name} and I'm {self.age} years old.")
person1 = Person("Alice", 25)
person2 = Person("Bob", 30)
person1.say_hello()
person2.say_hello()
