Trigger email notification when approver has requested more information on a requisition.

Hi All,

I'm trying to implement a change where an email notification should be triggered when an approver has requested more information on a requisition.
I'm editing existing 'Approval Notification report' to include logic to send email notifications to all the approvers when one approver has asked for more information on a requisition by clicking on 'Request Information' action.

I would like to understand how can I invoke a BIP report when 'Request Information' action is clicked by the Approver ?

Thanks.