Technical Deletion of conversations

Anyone know how to delete your conversations from your in and out box? I already have 4 that need deletion and I don't want them to build up. It can get sloppy.

Thanks

 

Click on the box to check mark it, another window will open and you need to select "Leave Converstion". I just figured this out myself.

 

OOOOHHHHHHH........I thought it was just to leave the conversation. Thanks

 

"It works, master"