formula help to get date from four cell through criteria, if not found result blank

dear excel expert

i am looking for help from you i have dates in 4 four cells i want formula to get dates from any one of cells. Through Cell Values From (Acutal Pod,Lenovo Pok,Parnter Pok,Commited Eta)

First Check In Acutla Pod If Date Not Found In Actual Pod, Then
Lenovo Pok If Date Not Found In Lenovo Pok Then
Partner Pok If Date Not Found Then
At Last Committed Eta. Even Though If Date Not Found In Four Cell Result "Date Not Found".

Find the attachment you may get understand....