Need an old friend's details

Hello... I have chatted previously with an old friend at MSN msgr and forgot my friend's email address... I searched my email contact, blocked lists, safe senders, my whole hotmail account and my msgr history as well as my pc... How can I find this friend again? isn't there any way to restore old chats with this friend from your servers? Please notice that this issue is very important for me and I have to reach my friend... Thank you in advance for your help & support... Best