Chinese phrase
您是哪位？ nín shì nǎ wèi
Meaning
May I ask who you are?
When to use it
This is a polite way to ask for someone's identity. It is common when the speaker does not recognize the person or needs to confirm who they are, and it sounds respectful or formal.
Example dialogue
抱歉，打扰一下，您是哪位？ bào qiàn dá rǎo yí xià nín shì nǎ wèi
Sorry to bother you, but may I ask who you are?
您好，我是李先生的助理，来参加十点的会议。 nín hǎo wǒ shì lǐ xiān shēng de zhù lǐ lái cān jiā shí diǎn de huì yì
Hello, I am Mr. Li's assistant, here to attend the ten o'clock meeting.