I'm looking for a disco song, sounded in a George Segal movie from 1983 - Trackdown: Finding the Goodbar Killer

There is even a link to the movie on youtube with the song in the background.
https://youtu.be/i2O_5fWwUL4?t=1h1m3s

The lyrics as I can hear them:

I.S.B.D
baby please, respond to me
I'm free, if you're free
I.S.B.D

papapapa papa papa, you're what I came for
papapapa papa papa you found what you came for
I.S.B.D