# Pre-book **Summary and examples** The Pre-Book transaction is used by partners to recheck the price and availability for a stay prior to making a booking. **Request example:** ``` ``` **Response example:** ``` ``` New PriceChangeIndicator attribute has been added to RoomType element in this example, but we also have the option to add this to RatePlan or Property element --- # 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://developer.rategain.com/ultradirect/ultradirect-transaction-sets-xml/pre-book.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.