> For the complete documentation index, see [llms.txt](https://developer.rategain.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developer.rategain.com/ultradirect/ultradirect-transaction-samples-and-usage/book-reservation.md). # Book Reservation This request is used to request that a definitive booking be made for one particular rate and room combination. #### Example Booking request: ```xml ``` * This example uses GuaranteeType="Guarantee" and the GuaranteeMethod="CreditCard”. * GuaranteeType="Deposit" is used for deposit rates (i.e. when the Deposit indicator is returned in the EST response). * See appendix A for guarantee type and method combinations. * The Remarks and ServiceRequest attributes should contain the exact same information as some CRSs may only look at one of these RateGain will pass a maximum of 189 characters for these fields, however, the CRS may have a lower character limit. * RoomRate attribute is optional – IF included, the value must be the same as the BookableRate value from the EST response. * Additional character restrictions: * Phone field - up to 20 characters – no dashes, spaces or periods * First and Last name combined should not be more than 99 characters * Email address field - up to 315 characters * Postal Elements including address, city, state, country, postal code - up to 315 characters combined * Credit Card field - up to 21 characters - no dashes, spaces or periods * Credit Card Issued Name field - up to 99 characters * Agency ID field –8 characters - no dashes, spaces, or periods #### Example Booking response: ```xml HotelML xmlns=" http://www.xpegs.com/v2001Q3/HotelML "> ``` --- # 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://developer.rategain.com/ultradirect/ultradirect-transaction-samples-and-usage/book-reservation.md?ask=&goal= ``` `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.