{
  "name": "input_request",
  "arguments": {
    "requestKey": "travel-destination-1",
    "reason": "A destination is needed to prepare the itinerary",
    "source": {
      "kind": "dynamic",
      "definition": {
        "title": "Add a destination",
        "fields": [
          {
            "name": "destination",
            "type": "text",
            "label": "Destination",
            "required": true
          }
        ]
      }
    },
    "prefill": {
      "destination": "Shanghai"
    }
  }
}