Transfer to another client inside the ticket

Hello, 

I'm a young back-end developer and i work for a company as a trainee.

My company has many clients and it takes time to transfert pending tickets to an existing client.

--> (return to the tickets list, tick the checkbox, transfert to the pending list etc...).

So, i'd like to put a little form inside the ticket which would allow to transfert the pending (or not) client to another one quickly.

I'll work for it soon, so if someone want to help me (cauz i don't really know the source code of glpi), i would be grateful !

Thanks for reading me :)