"Name Surname is currently unavailable at the moment. Please leave a message after the tone"
"Hi, you've reached Name Surname form ABC Holding. I cannot receive your call right now but if you leave your name and phone number I will call you back a-s-a-p"
"Thank you for calling ABC Corporation. Your call will be answered in the order it was received"
"You are calling Bla-Bla Limited. We are currently looking for a free operator to attend your call. Please hold the line"
и, конечно же,
"The number you have dialed cannot be reached at the moment. The mobile phone is switched off or out of the coverage. Try later."