Wharton Networking Guide - 4.
People are pretty willing to help and most love to talk about themselves.
If someone is too busy, she or he will tell you. I do not know what to say on the phone. Introduce yourself, where you are going to school, how you got this person's name, and what your purpose is for calling. Be prepared to communicate your interests and strengths, so your contact gets a better sense of who you are and what you have to offer. I do not feel comfortable asking others for help.