user
Given a cartoon image and a caption. Caption: So, you're saying you didn't miss your last two appointments? Question: Generating an explanation of why this image/caption combination is funny. Answer: 
assistant
The therapist thinks that his patient, the chameleon, missed his last two appointments because chameleons blend in with their environments. The chameleon was actually at the appointment, but blended in with the couch, so the therapist didn't see him.