May I ask who is calling?

请问你贵姓?

May I ask for your surname?

请问你姓什么？

May I ask who is speaking?

请问是谁打的电话？

May I ask what brought you here?

请问你为何来这里?

May I ask there you are from?

我可以请问你是哪里人吗？

May I ask how the chain volume do?

请问内链怎么批量做？

May I ask who's calling?(This is Judy.)

请问你是?我是茱迪.

May I ask how much is this watermelon.

请问这个西瓜多少钱？

Excuse me, but may I ask your name?

对不起, 请问尊姓大名.

May I ask the reason for your remittance？

可以请问汇款的原因吗？