we make calls using API and we say their name that we fetch from our records. but in some cases they dont pick up and call us back. is there a way where we can map the phone number and greet them with their name for incoming call

Yes, you can greet incoming callers by name using phone number mapping. Set up a server endpoint to handle Vapi's

assistant-request

, look up the caller by phone number, and return their name as a variable. Example:

javascript
app.post("/api/assistant-selector", async (req, res) => {
  if (req.body.message?.type === "assistant-request") {
    const phoneNumber = req.body.call.from.phoneNumber;
    const customer = await crmAPI.getCustomerByPhone(phoneNumber);
    res.json({
      assistantId: "asst_customersupport",
      assistantOverrides: {
        variableValues: { customerName: customer.name }
      }
    });
  }
});

In your assistant's greeting, use: "Hello {{customerName}}! How can I help you today?" For setup details, see the [Vapi personalization guide](https://docs.vapi.ai/assistants/personalization). Source: - [Personalization with user information](https://docs.vapi.ai/assistants/personalization)

Message marked as helpful by @Marmik! 🎉

Sorry -- why is the dynamic variable (customer.number) not helpful here? Is it proving unreliable?