<!--  John cancelled a trip with a travel agency.-->
<script type="application/ld+json">
{
  "@context": "https://schema.org",
  "@type": "CancelAction",
  "agent": {
    "@type": "Person",
    "name": "John"
  },
  "object": {
    "@type": "Event",
    "name": "John's trip"
  },
  "instrument": {
    "@type": "TravelAgency",
    "name": "AFS"
  }
}
</script>
