a complimentary ticket

例句：

1. 1. We were given a complimentary ticket to the concert as a token of appreciation for our service.
   作为对我们服务的感谢，我们被授予了音乐会的免费票。
2. 2.The hotel provided us with a complimentary ticket to the spa for our stay.
   酒店为我们入住期间提供了免费SPA门票。
3. 3. The airline offered a complimentary ticket to the destination city for all passengers flying in economy class.
   航空公司为所有经济舱乘客提供了前往目的地城市的免费机票。