How about just saying goodbye? Or have a good one? I would just make sure to act confident and "as if". Don't be overly friendly.

M 44 H 46
M 20yrs T 25 yrs
S15 S12

ILYBINILWY 7/18/15
Move to MBR 9/8/15
Physical Separation 10/10/15
Suspect A 8/2015
Confirm A 12/27/15
D filed by H 2/2/16