> ## Documentation Index
> Fetch the complete documentation index at: https://docs.retellai.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Pronounce the phone numbers correctly

> Make Retell agents pronounce phone numbers clearly using the Read Slowly feature, with prompt examples and best practices for digit-by-digit pacing on calls.

## Overview

This guide explains how to configure your AI agent to pronounce phone numbers correctly and consistently. We'll use the Read Slowly feature to add pauses between words, enhancing clarity.

## Prompting Technique

We'll utilize the Read Slowly feature to add pauses between words. For more information, see the [Speech Controllability documentation](https://docs.retellai.com/agent/speech-controllability#add-pauses-how-to-read-slowly).

It's recommended to include a prompt as a guideline for the LLM to follow. This ensures that the agent can consistently reply with the correct format, even if customers double-check the phone number.

## Prompt Example

```
When people ask about your phone number, your phone number is 4158923245

## Guideline
When speaking the phone number, transform the format as follows:
- Input formats like 4158923245, (415) 892-3245, or 415-892-3245
- Should be pronounced as: "four one five - eight nine two - three two four five"
- Important: Don't omit the space around the dash when speaking
```

## Audio Example

Listen to this audio clip for a demonstration of proper phone number pronunciation:

[Speak Phone Number Example](https://retell-utils-public.s3.us-west-2.amazonaws.com/speak_phone_number.wav)