Hello X,
Thank you for your interest in X. I was very impressed with your cover letter/resume. We are in a very busy period right now with upcoming events and I will not have time to speak to you until early April. In reality, we could use you as an intern NOW! Come April, if you are still researching internships, please call me to discuss opportunities at X.
Take care, X
Here is what i want to write back. I need to tell him that i need a positive or negative response before the end of march. Does this work?!
Thanks Mr. X for your kind response. I realize how difficult it can be to get everything done when you have lots of things to do.
However, my university puts a lot of pressure on student about the importance of the internship to be in place by the end of March (this is basically the reason why I am planning everything so much ahead of time even if the internship will start in October).
Squeezing out 20 minutes from an extremely busy schedule can get impossible in some cases, but if you got those 20 minutes just let me know. I can assure you it will not be a waste of time and that a phone interview will not do anything but convince you that I am the person you need are that you are looking for.
Thanks again for your time,
X