Approval required for High priority ticket

[Manigautham]

when an user create high priority ticket it should go for approval. How to acheive this?

[Uncle Rob · Accepted solution]

Depends what you mean by "Ticket", but flow designer makes this pretty easy.
Just use the approval flow action.

[Manigautham]

I meant High priority incident.  Thanks for the response

[Uncle Rob]

Makes zero sense from a process perspective. 
Priority should be based on solid definitions of Impact and Priority and not "approved"
But if it must happen, just use a Flow with an Approval activity.  
The flow fundamentals course on NowLearning can show you how to do that very quickly.