curl "https://api.voyantcloud.com/v1/products/prod_123/itinerary/days/day_001/accommodation" \
  -H "Authorization: Bearer $VOYANT_API_KEY"

{
  "assignment": {
    "id": "dayacc_001",
    "option": {
      "id": "accom_opt_123",
      "name": "Hotel Riviera - Deluxe Room"
    },
    "nights": 2
  }
}