Elicit as many different types of ticket as the students can think of, including different kinds of show, sporting events and travel etc.
Ask the students to stand in A and B pairs. Say ‘each A student has a ticket for something special next week. Unfortunately something has happened and they can’t use the ticket. So A decides to offer the ticket to B. A should explain to B what the ticket is all about. B wants to use the ticket but should explain politely to A why he/she can’t’
When they have finished, ask the Bs to stay where they are, while each A goes to another B and offers the same ticket as before. This time B could use the ticket, but needs to explain politely why they don’t want to.
Ask each A to go to another B, who is delighted to accept the offer of the ticket.
Tell the B students that they have used the ticket, but that there was a problem. They meet A, who asks them all about what happened.