Oil prices were flat in holiday-reduced Asian trade today, as investors booked profits before the end of the year. New York's main contract, West Texas Intermediate (WTI) for February delivery, added two cents to 99.31 US Dollars in mid-morning trade while Brent North Sea crude for February rose five cents to 111.26 Dollars. WTI fell 1.03 Dollars in New York on profit-taking Monday after it closed above the psychologically important 100 Dollars level on Friday, buoyed by upbeat sentiment about US demand. Brent closed 97 cents lower in London trade.Financial markets in Tokyo, Manila, Seoul, Bangkok and Jakarta were closed for public holidays.