@Fa5t3r - I would try a wide range of different tones when recording and play them back to see what goes over the best and what projects the image you want people to hear. Remember that some people may be going to hear this message over and over again depending on how often they have to call you so you want it to be very pleasant and not at all irritating.
The phone you use to record your greeting – and your surrounding – can turn your carefully scripted greeting into an unprofessional mess. Background noise is terribly distracting, so choose a quiet room or parked car to make your call. Landlines, or a “wi-fi enabled” cellphone call, can provide much better connection quality than a standard cellphone. If you must use a cell phone, be sure to use a high-quality headset for the best clarity.

6.) Welcome to John Doe. Our telephone hotline is not occupied over the holidays. Exact opening times can be found on our website at www.johndoe.de. We thank you for your confidence and wish you and your loved ones happy holidays and a happy new year.
What’s more, according to WP Beginner, “more than 88% of local searches on mobile devices end up in a phone call,” so you don’t want to be caught off guard when a customer calls!