First, let the students fill out the first part of the worksheet (the dialogue). Sample words and phrases are on the side and under so students won't have to think of verbs (2) and gerunds(1) to write. They could freely change it or come up with their own of course.
After filing out the first part, have a demonstration with the JTE. Encourage students to include reactions (me too, really? that sounds fun) I always find speaking interaction more natural when I hear students say their reactions.
Let students practice the dialogue with a pair for the first try then let them stand up. look for five friends to talk to and write memo (2nd part). If students could do the dialogue without the worksheet (or at least not totally looking at it while speaking to someone else), challenge them not to look at it.