You can convert an existing conversation to a task in one click. To do this, open up a conversation popup window by clicking on the conversation name on the list view. Click the drop-down arrow to the right of the conversation title at the top and then select 'Convert to task.'
Deltek Collaboration will pop-up a screen to confirm if you wish to proceed in converting this conversation to a task. Note that this process is irreversible once done. When you click 'Convert,' you will see the task appear on the list view in the Conversations and Tasks tab.