iExpense workflow - expense report approval

We specific scenario with oracle iExpense workflow in R12.0.4When an employee’s approving manager is on vacation, or called out on a family emergency, and they have not set their vacation rules to forward expense reports to the next manager for approval.
In the this scenario, since the manager didn’t setup the vacation rules the System considers that the manager is in office and expects the response on the Workflow notification.  The manager will  have 10 days(timeout period) to respond on the notification. If the manager doesn’t respond ( not approved, not rejected , not delegated/transferred the ownership to another manager) within the timeout period, a notification is sent to employee who submitted the report. The submitter need to take action to withdraw the report and resubmit the report when Manager is available.