Your voicemail should be very specific. It should be short and urgent. Use word's like "need", "should", "must" , or "have to" to create a sense of urgency. For example, say something like, "We need to discuss..." or "We should talk about..."
Responding to voicemails is time-consuming. Fortunately, with the right greeting, you might be able to save yourself some hassle. If you don’t have an auto attendant, you can give callers the information they are looking for with your voicemail greeting. Of course, this means that your greeting may be a little lengthy, but that can work in your favor as callers will only stay on the line to leave a message if they still need assistance.

check words for the English /oʊ/ vowel. Many non-native speakers make this more like a single vowel and it’s a double vowel so it should have /o/ and /ʊ/ smoothly joined together. Check it in the word ‘phone’ . Another double vowel to look out for in your Voicemail Greeting example is the diphthong vowel /eɪ/. This vowel is in words like ‘wait’ and ‘able’. Many people use the word ‘can’t’ in their Voicemail greeting example. This can be a trap for non-native English speakers. That’s why we chose ‘unable’ instead! Watch out for the word ‘can’t’! In American English and British English the vowel in ‘can’t’ is pronounced with the vowel /æ/ like in ‘pat’ – /kænt/.
Voicemails need to maintain a professional consistency that’s aligned with the entity it’s representing. That said, the structure can vary depending on the situation. There’s no template set in stone. In fact, trite and generic should be off the table. The goal should be a balance of uniqueness and practicality.