In your profile you can indicate that you are on a holiday. This is not required, but can make it easier for you to not receive any booking requests. To add holidays in your profile, login to your account and go to More. Under Add a holiday you can click Add a new holiday. Now you can specify the start date and end date of your holidays. Once you have added the holiday, all the appointments during this period will be cancelled.
We recommend you to discuss the holiday directly with your customers. They can decide for themselves if they would like a replacement for this time period. For them it is preferable if you do this some time in advance. If you add the holiday period, customers will get an e-mail, but discussing it with them personally is often preferred.