class HelloWorld:

    def makeNames(self, firstName, lastName):

        self.firstName = firstName
        self.lastName = lastName


    def display(self):
        return self.firstName + ' ' + self.lastName

    # Send a little message
    def hiYou(self):
        # print a little message to the STDOUT
        # in python 3 must use print()
        print('Nice to meet you, ' + self.firstName + ' ' + self.lastName + '. Hope you are ok?')

        mood = input("Are you ok? (y or n): ")
        if mood == 'n' or 'no':
            print("Oh sorry to hear that!\n")
        elif mood == 'y' or "yes":
            print("Great, thats nice to hear!\n")
        else:
            print("Error! Sorry I don't know that responce")


name = HelloWorld()
# Get user input rather then hard code the name??
name.makeNames(input("Please enter a first name: "), input("Now enter a last name: "))
# Just make sure its showing the names we have used
name.display()

# Now print our message out
name.hiYou()

OUTPUT:
All the if, elif and else statments worked as expected