> For the complete documentation index, see [llms.txt](https://docs.smartbotpro.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.smartbotpro.io/mini-course/data-validation.md).

# Data validation

Now let's find out if it is possible to set up data validation using the example of a phone number.

### Option 11

In the "Process message" block there is a checkbox "Use template". 

This way I can choose the format of the response that I expect from the user. For example, you can set the following pattern: "My phone is ". Whatever the user writes in place between "<" and ">" must follow a certain format. It can be a number, email, phone number:

![](/files/WZJXPle5Ne8J4u45pFmT)

If the user writes a message that does not match the template, an error exit will be triggered. Graphically, it is indicated by an exclamation point. Write a hint to the user:

![](/files/pkgTz3qRDkKpvtxERVhJ)

Now the bot will explain to the user what is expected of him, and will again wait for a response.&#x20;

### Option 2

You can make it easier: add a button to send the phone. This is a native Telegram button that allows the user to send the number associated with the account. Please note that this option is available only in Telegram.&#x20;

Now there is no need for data validation:

![](/files/h6NwnA3KtA0dXsU3FAeS)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://docs.smartbotpro.io/mini-course/data-validation.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.