If I bought a non-rev tkt from DFW to TYS would the tkt counter allow me to change the city pairs?

Example.....TYS to DFW
or
IAH TO TYS

I was told (I work for Wn) that it is up to the agent to honor the ticket if the city pairs are different.

I have a RT non-rev tkt on Northwest
and also a OW on American.

Which airline is more helfpful with stuff like this?

The dollar amt. or value of the tks would cost the same no matter what the cities are.

I know our agents at Wn have told me they take them.......for other airlines.

Any help on this would be GREATLY appreciated!


Deb