Adding Requisition Lookup

Summary

I want to add new lookup for requisition status

Content

Hi,

We want to add some option to requisition flow. We want to check  "The Product is in our warehouse or not?"

We will add warehouse staff in requisiton approval system. Every request come front of the warehouse staff as a approval mail or notification. 

Warehouse staff should see two button in mail or notification actually instead of Approve and reject. Must be "Was Delivered" and "Need to Buy".

In back end, "Was Delivered" must run Reject the other one run 'Approve'. I can use Approve and Reject button. But it not make a sense.