input: Write a python function to generate a message using the name and message provided.
  assert generate_message('Alice', 'Hello, world!') == "Alice said: 'Hello, world!'"
  assert generate_message('Bob', 'Good morning!') == "Bob said: 'Good morning!'"
  assert generate_message('Charlie', 'How are you?') == "Charlie said: 'How are you?'"
output: def generate_message(name, message):
      return f"{name} said: '{message}'"