Use the sentences to complete the dialogue.

Rob: Hi Karen, are you doing anything special later?
Karen: Not really, why?
Rob: I'm going to play water polo. 1) ...
Karen: 2) ...
Rob: Do you like water sports?
Karen: Absolutely! I love all kinds of water sports.
Rob: Me too! Have you ever played water polo?
Karen: Yes, I've played with my brother.
Rob: Really? 3) ...
Karen: 4) ...
Rob: Good! Then you can join our team on Saturday. We're playing against a team from out of town.
Karen: This Saturday? 5) ...
I've promised my mum I'll help her around the house.
Rob: That's all right. Maybe you can make it another time.