Dublin Cars typically offers flexible options for modifying or canceling reservations, but the specific policies may vary based on the terms and conditions associated with your booking. Typically, customers can manage their reservations through the official website. There, you will find detailed information regarding the modification and cancellation process, including any applicable fees or timeframes. It is important to review the terms at the time of your booking to understand your options fully. If you are looking for specific instructions or details about your reservation, consulting the official website is advisable, as it provides the most current and relevant information regarding policy updates and procedures.