I would question the morality of this suggestion and whether the person whose staff travel it is might get disciplined for it. If you don't pay them it should be OK as that's the way it works for friends, but once you start paying the individual whose staff travel it is they would be on very dodgy ground if their company found out I would think.
Of course you might say no one will find out but is it worth taking that risk for a stranger? If the fee you're offering them is large enough to make the risk worthwhile it wouldn't be worth your while.