To the OP: the employee should be able to answer all questions and give you flt info and available seats:
Link to AA buddy passes (where this belongs):
http://www.flyertalk.com/forum/ameri...solidated.html
Here is a good link about buddy passes (DL):
http://www.flyertalk.com/forum/delta...ve-thread.html
I found this one from DL. Good info. I AM SURE THESE RULES ALSO APPLY AT AA/US:
http://travelinfo.delta.com/dlnonrev/Buddy_quette.pdf
Remember you are D3 (low). You should have the person that gave you the pass check flts for you and let you know the rules flying on AA/US.
I've used a buddy pass years ago, it was not my cup of tea. The employee is also responsible for your actions. Read the Delta buddy pass link above (I am sure AA/US are very similar).
Happy travels.