你有什么问题可以联络我们的客户服务主任。

Nǐ yǒu shénme wèntí kěyǐ liánluò wǒmen de kèhù fúwù zhǔrèn.

If you have any questions, please contact our customer service director.

这位主任非常负责。

Zhè wèi zhǔrèn fēicháng fùzé.

This director is very responsible.

请问主任有空吗？

Qǐngwèn zhǔrèn yǒu kòng ma?

Excuse me, is the director available?