Agent Rule for Travel Assistant

Hi,

We have recently implemented Travel Assistant App using which an Admin can go in and create expense report for VP.

We also have workflow WS20000040 (TS20000131) configured where we are using Agent rule 00000168.

This has created a problem. When Admin creates expense report for VP1, it is sending the workflow email to manager of Amin which is VP1, but what we want is that emial should go the manager of person for whom the expense report is created.

Is there any existing rule that can be used here or do i have to crate a custom rule.

Please advise.

Thanks!