One possible version:
Anna: Next Sunday is Kate’s birthday, do
you remember?
Jack: Of course I do.
Anna: How shall we celebrate is?
Jack: First of all, a birthday present. I’m
going to buy her a birthday cake.
Anna: Oh, I think it will make her very
happy. What about a special dinner?
Jack: That’s a good idea! But, who can
cook?
Anna: Er… I think we can eat at a
restaurant.