F: Hello David! How are you?
D: Fine. I had finished my English class, today. I relax.
F: Oh well! Why don´t come to grandfather´s eightieth birthday?
D: Thanks. But I have a few things to do at home.
F: I´d really like you to come. I´m inviting some friends from our class.
D: Ok. So I should bring something.
F: No. Not necessary.