Answer: The best course of action is to ask your colleagues assistance in analysing each customers need, so that calls to each customer will be very brief and informative.
Explanation: because you have several internal customers you need to call, you may not be able to remember the need or discussion of each customer and how to address those needs, you really have to check your note to be able to remember each customers need and supposed discussion. Telling your friends to help you check each customers need on your note and how to address each need will help you close up all the calls more faster. Your colleagues cannot call your internal customers on your behalf, when you're around, because it will be a bridge of your duties, that is taken up your duties while you're present in the office, rather a colleague can help or assist you perform your duties.
