1) Sorry, your phone call wasn't connected as the in-charge was away on other duty;
2) Do you mind, would you please give your name and company's ;.
3) Boss, someone want to see you and is waiting at the reception;
1. He/She is not at his/her desk right now. (you don't have to say 聽唔到電話, it is logical enough that someone can't pick up the phone when he/she is not at his/her desk, right?)
2. May I have your name and your company name?
3. Hey Boss (or his name), I have a guest/few guests waiting for you at the reception area.
2012-06-19 02:30:26 補充:
2. should be "May i have your name and THE company name?"