This year Delta Air Lines has taken around $7.60 a passenger and received over five complaints from every 1, 000 passengers.

美国美达航空公司今年对每个乘客收取7.60美元的托运费，但是每1000个旅客中就收到超过5个旅客的投诉。

Other services include VIP passenger reservation service, "Lost and Found", complaints on service quality and online purchase problems and directory of customer service call numbers.

其他服务包括：重点旅客预约、遗失物品查找、质量服务投诉、网络购票投诉、建议及客服电话查询等。