In Australian English it’s pronounced with the vowel /a:/ like in ‘part’. Problems arise when people use the /ʌ/ vowel (like in ‘up’) instead of /æ/ or /a:/. If you do this is will sound like the worst swear word in English. Many non-native speakers often pronounce the vowel /æ/ more like /ʌ/ because they don’t have a vowel like /æ/ in their first language. Many speakers of European languages will do this (Spanish speakers and Italian speakers) and also speakers of Japanese and Korean. This problem with /æ/ also means that if you say the word ‘back’ in your voicemail greeting sample, you are likely to pronounce it more like ‘buck’. remember to pronounce word endings in English. Check you aren’t dropping any endings off or mispronouncing them.
This video on English Voicemail Greeting Sample covers the key areas of English pronunciation such as double / diphthong vowels, long vowels, word stress and word endings and more.

Sample Leave Phone Messages. [blockquote]I’m suffering from a bad tooth ache and will be going to the dentist to have it fixed. I therefore will not be able to come to work today. [/blockquote] [blockquote]My parents are coming home today from my native and my dad will have to be taken to the hospital for a detailed checkup.
You probably touched on this at the end of your last conversation, but if you haven't heard from your prospect in a while, this can be a useful strategy for getting back on their radar.