I'm sorry, he's in conference at the moment. May I ask him calling?
对不起，他现在正在开会。请问是谁找他？

Telly Jackson.
特利杰克逊。

Can I take a message?
我可以为你捎个口信吗？

Please have him call me back as soon as possible. My number is 5560378.
请叫他尽快回我电话。我的电话号码是5560378。

Alright. 行。