def format_name(first_name, last_name):
	"""This function receives the first_name and last_name parameters and then
	returns a properly formatted string."""
	if first_name != "" and last_name != "":
		string = "Name: " + last_name + ", " + first_name
	elif first_name == "" and last_name != "":
		string = "Name: " + last_name
	elif last_name == "" and first_name != "":
		string = "Name: " + first_name
	else:
		string = ""
	return string