The voucher did not have details of the boarding area. When I inquired, I was told to contact an operator at Exit 7 on the 2nd floor. However, there is no operator stationed at Exit 7 on the second floor of Suvarnabhumi Airport. Normally, buses board on the first floor, so the airport information counter told me to go to the first floor. So I was very confused because I did not know where to board the bus. In the first place, you should indicate the detailed boarding area on the voucher.