服务员 (fúwùyuán) is a noun meaning "waiter," "waitress," or "attendant." It is the standard term for service staff in restaurants, hotels, and shops, and can also be used to call for a server's attention.
服务员,请给我一杯冰水。
Fúwùyuán, qǐng gěi wǒ yī bēi bīng shuǐ.
Waiter, please give me a glass of ice water.
这家餐厅的服务员态度特别好。
Zhè jiā cāntīng de fúwùyuán tàidù tèbié hǎo.
The waiters at this restaurant have a really great attitude.
服务员微笑着把菜单递了过来。
Fúwùyuán wēixiào zhe bǎ càidān dì le guòlái.
The waiter handed over the menu with a smile.