| APPLICATION_ERROR | TOKEN_DETAILS_SERVICE_ERROR | Could not obtain session token details. |
| APPLICATION_ERROR | TOKEN_SERVICE_ERROR | Could not obtain session token. |
| APPLICATION_ERROR | IGNORE_TRANSACTION_SERVICE_ERROR | An error occurred while invoking an internal service |
| BAD_REQUEST | INVALID_HEADER | Required header 'Authorization' is missing |
| BAD_REQUEST | INVALID_HEADER | Required header 'Authorization' is invalid |
| BAD_REQUEST | INVALID_VALUE | Validation Failed: [specific description] |
| BUSINESS_ERROR | IGNORE_TRANSACTION_FAILED | Errors retrieved from downline service |
| APPLICATION_ERROR | RESERVATION_SERVICE_ERROR | An error occurred while invoking an internal service. |
| BUSINESS_ERROR | BOOKING_NOT_FOUND | Booking not found for provided 'pnrLocator'. |
| BUSINESS_ERROR | RESERVATION_SERVICE_FAILED | No Reservation or Segment data. |
| APPLICATION_ERROR | DATE_TIME_CONVERSION_FAILED | Error on date conversion. |
| BUSINESS_ERROR | OFFER_ITEM_NOT_FOUND | Offer item $id not found in cache. |
| BUSINESS_ERROR | OFFER_DATA_NOT_FOUND | Offer data not found in cache. |
| BUSINESS_ERROR | PAYMENT_DATA_NOT_FOUND | Payment Transaction data not found in cache. |