Users often don’t invest enough time into their messages, resulting in incomplete, unprofessional, or otherwise under-whelming greetings. Sure, crafting a greeting doesn’t sound all that complicated; however, there are a number of pitfalls users can fall into—i.e. informality, terseness, sincerity, lack of direction, and more. While none of these sound too catastrophic, they are often interrelated. As such, they tend to worsen any problem. For example, humor can cause informality, worsen ambiguity, and weaken sincerity. That being said, users should strive to avoid ALL these pitfalls.
In this case, the agent shows concern for the customer and wants to serve him in the best possible manner. The agent is also polite and courteous.

If you’re going to be out of the office on holidays or vacations, make that known in your voicemail so customers don’t think they’re getting ignored. Nothing is more frustrating to a customer than when they can’t reach you and assume you’re ignoring them.
2.) Vous êtes connecté à la boîte de messagerie de M. John Doe. Laissez un message pour que M. Doe puisse vous rappeler dès que possible. Merci beaucoup de votre appel.