Enable quick response for galaxy a520

I want to enable a function on my phone that when i dont answer to a call, an automatic messege be sent to the caller.

I have galaxy a520 and i want to know what is the procedure if this option is available on my phone, and if its not, is there any android app for this?

There is a quick response option On my phone but u can only change the templates there, and there's no other options to activate/deactivate or the like!

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