# Prompts {% embed url="" %} Flow Phantom allows you to establish custom call-to-action prompts for your upsell offers. To do this, simply set a `data-fp="prompt"` [data attribute](https://university.webflow.com/lesson/custom-attributes) on a Webflow text block or header element. ![Input box for data-fp="prompt" data attribute](/files/NEMQxTv1wQa3DoDzr3T1) During the upsell or cross-sell process, the inner text of the element carrying the `data-fp="prompt"` data attribute will be replaced with the appropriate custom prompt. In instances where your upsell or cross-sell offer lacks a custom prompt text, the default prompt will be utilized. This default prompt is the text you originally entered within the Webflow designer. --- # Agent Instructions: 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: ``` GET https://docs.flowphantom.com/features/prompts.md?ask= ``` The question should be specific, self-contained, and written in natural language. 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.