Hi, there is available a solution to create Check-in in editor? I WOULD LIKE TO USE STOCK REPLY FOR CUSTOMERS, I need to place a Reply template into Saved Reply, user call to use it, then another can mark that check in item. 

Unfortunately, Im not sure what you mean here. Do you have an image perhaps of what you are trying to achieve from elsewhere that you have seen? 

I would like to set a checklist template in Stock Reply, then available to be checked in the Editor 

https://www.123rf.com/photo_17674214_a-checklist-on-a-wood-and-metal-clipboard-with-a-check-next-to-the-first-item-a-list-of-things-you.html

can be a workflow with tasks to be carried out by members and each time they have completed a task they must check the box

I believe you could do something like this in a Pages database.

There is nothing like this in the core platform. Even in a pages database, you wouldnt be talking about replies. Instead you would be looking at the topic/database entry itself