This you'll have to find out from Jamie herself. After you talk to Professor Appleton -
What is there to find in the dorm?
-- go to Munray's.
What am I doing in Munray's?
When you talk to Jamie, say everything you can think of to get her to talk to you.
When you say "Oh, come on ..." she mentions that her dog's name is Benji. Remember that notice in the hall at Tiffany's place about password safety?
Jamie's password is "benji," all lowercase or all uppercase. (If you capitalize it -- "Benji" -- it won't work.)