Add CC address on Ticket

Add CC address on Ticket

I would like to be able to include another user in a ticket for updated status.    There is another program that we were using before we moved the Zoho that would allow for two things we didn't anticipate when moving.  

The first is I would like to be able to add a cc for users, for instance someone in a department might open a ticket, and then someone else might call with the same issue and I would like to be able to include them in any updates to the ticket.   Currently a ticket is only open for one person and only that one person gets the information.

The second request would be to the ability to merge tickets,  in the product that we used previously the merge option would merge the information on each ticket together and then add the persons on the merged tickets as CC'd users on the original ticket.

Your thoughts?