Auto Merge/link

Auto Merge/link

Hi ,
I have an Issue,
I wanna merge or link 2 requests automatically when second request is created 
(E.x: Request 1:    ID: "1234" with subject this: "Email Server has been DOWN!"
(E.x: Request 2:    ID: "1235" with subject this: "Email Server has been UP!"
 Tell me It's possible?
 Please go ahead and help me as soon
Thanks for you advise 
warm regards

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