1.   And all good luck to him.

2.   Good luck in your exams.

3.   Good luck in your new home!

4.   In which case, good luck to them both.

5.   Good luck to him anyway.

6.   Good luck to Paul from all of us.

7.   Good luck to you, Imogen!

8.   Good luck to you, Mr Freer.

9.   Good luck with the start of your classes -- and see you soon!

10.   Yeah, good luck to them!