Before drafting an out-of-office message, consider the audience. Decide what you want to communicate, and what will they respond to. For example, you should inform the recipient that you are out of the office and that he/she should not be able to call you. You should also mention the date and any emergency contact information. If the out-of-office email is not sent to your entire team, you can include a personal note.

See also - https://buddybio.com/read-blog/10123_best-examples-for-the-auto-reply-for-best-out-of-office.html