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.
2.) Cher client. Malheureusement, tous nos représentants sont occupés avec d’autres clients. Veuillez patienter. Merci

You should script out your greetings, rehearse, and find a tone of voice that is reflective of your professionalism and your company’s personality. If applicable, your tone and your message should take into account that certain industries and companies are more conservative than others.
35. Hello, we’re wishing you all a happy [X holiday]. Our office is currently closed so our employees can celebrate with their loved ones. Please leave your name, number, and reason for calling and a member of our team will return your call when we reopen on [X date].