Chinese phrase
您是〜吗？ nín shì 〜 ma
Meaning
Are you ___?
When to use it
Asks whether someone is the person named or described. It is a polite way to check a person's identity, often at the start of a call or meeting.
Example dialogue
喂，请问您是 王先生 吗？ wèi qǐng wèn nín shì wáng xiān shēng ma
Hello, may I ask if you are Mr. Wang?
我就是王先生，请问您是哪位？ wǒ jiù shì wáng xiān shēng qǐng wèn nín shì nǎ wèi
I am Mr. Wang. May I ask who is speaking?