HONG KONG (Reuters) - Cathay Pacific Airways said it would guarantee thousands of first and business-class flights sold at huge discounts after a ticketing error, calling the mistake a surprise special on New Years Day.The Hong Kong based carrier acknowledged the error on its twitter feed on Wednesday, stating "we made a mistake but we look forward to welcoming you on board with your ticket issued. Hope this will make your 2019 special too!"The tickets are for flights from Vietnam to New York on Cathay Pacific for around $675 return instead of about $16,000 normally.With the hashtags "Promisemadepromisekept" and "lessonlearnt" the carrier said it would maintain the economy fares.The fares were not available on Cathay's website on Thursday. 20 PHOTOS 20 best airlines in the world See Gallery 20 best airlines in the world 20. Hong Kong Airlines Previous rank: 24 Why it's awesome: Hong Kong Airlines has been on an impressive growth streak over the past couple of years. Not … [Read more...] about Airline makes good on first-class ticket blunder