Extract Dynamic Variables

Capture and store information from the conversation as dynamic variables for use later in the call.

Overview

The Extract Dynamic Variables tool lets your agent capture specific pieces of information a caller provides — like their name, phone number, or appointment preference — and store them as variables that can be referenced throughout the rest of the call.

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Setup

1. Add the tool

   In your agent’s Functions section, select Extract Dynamic Variable from the dropdown.

2. Define each variable

   For each variable you want to capture, provide:

   Field	Description
   Reference name	The variable name used to reference it later (e.g. user_name)
   Description	What this value represents
   Data type	One of: Text, Number, Enum, Boolean
   Enum options	Required if type is Enum (e.g. "Yes", "No", "Maybe")

3. Update your prompt

   Tell the agent when to extract the information:

   When the user states their name and phone number, extract the information by calling the extract_user_details function.
   

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Supported Data Types

Type	Example values
Text	"John Smith", "headache"
Number	42, 98.6
Enum	"Yes", "No", "Maybe"
Boolean	true, false

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Using Extracted Variables

Once captured, reference variables anywhere in your conversation using {{variable_name}} syntax — in prompts, function parameters, SMS messages, and more.

Variables captured during the call also appear in the Post-Call Analysis panel, where you can review extracted data field by field.