In addition to the Call Analysis Dispositions you can select in the Rule configuration settings drop-down, you can contact Support to get specific dispositions to type in. See the article at https://help.mypurecloud.com/articles/add-rule/ for an example.
It says, in part: The ability to enter free-form disposition strings is intended for limited use by customers with special requirements, as instructed by product support personnel. This feature supports any call analysis disposition that PureCloud Edge may return.
There is an article in the Resource Center which lists all the Wrap-up codes that might be assigned by the system:
https://help.mypurecloud.com/articles/wrap-up-codes-assigned-by-outbound-dialing/
So, to handle the situation where a customer hangs up while waiting for an agent (or the system disconnects the call because no agent is available), you would have to contact Support to get the Disposition code and type that in.