3 Airline tickets Glasgow airport to Lanzarote 9/12/12 to 23/12/12 ?

Three airline tickets from fly Thomas Cook departing from Glasgow Airport on the 9/12/12 at 9:30 am returning from Lanzarote airport on 23/12/12 at 1:00 pm. £20 change of name fee per person per flight to be added. Easy enough done on web site. Due to work commitments we cannot use flights. Original price was over £400. Plenty of hotels S/C for under £250 for the 14 nights on travelrepublic.com or thomascook.com.