Hey everybody,
I am currently trying to update my personal flight records and I am missing the registration of an aircraft that I travelled on a long time ago. Maybe one of you can help me get the missing info. Here is what I have:

Canadian Airlines Flight CP944, Boeing 737-200, Toronto - Halifax, 27 August 1991

I really hope somebody can help me out with the identity of the aircraft operating this flight. Thanks in advance.
Peter