This post has a variety of sketches and roleplay activities to be used with students.
Here are five sketches I used with pupils ages 13/4.
i-spy (for 2 pupils: vocab varied)
in-the-airport (for 2 pupils: vocab travel, countries)
on-the-way-to-school (for 3 pupils: vocab repetitive, school)
the-playground (for 2 pupils: vocab worms!)
the-very-greedy-child (for 2 pupils: vocab food)
This is a presentation suitable for younger/less experienced learners as a prompt for them to create a short sketch of a telephone conversation.