I left my MACBook air in the trolley in front of departure lift at Sydney international airport about 10 minutes to 7pm on 18 July 2017. The notebook was in a dark slim case and with 2 apple stickers on the cover. If someone found it, could you please contact me urgently because I have my course materials and other things important to me stored on my computer. I am happy to provide a reward for your kindness. My contact is 0423186338.