Terms and Conditions for booking This promotion for economy class ticket on one way and round trip. Reservation date on 02-09 October 2014. Departing date on 10-25 October 2014. No discount for Child and Infant. Name Change, reroute, change flight/ date and upgrade are not allowed after booking has been confirmed. Limited seat per flight. Thai Smile reserves the right to change fares and conditions without prior notice.