Wisevoice Chat Callback Activity is a custom activity you can import in your UiPath flow in order to send query results to ongoing Wisevoice conversations.
The general use case is getting asynchronous query results into a conversation.
In the Wisevoice platform we can configure a chat so that the user can input some parameters for a search (a date, a destination, his account number, etc).
After inputing the parameters, the Wisevoice platform will trigger an UiPath job sending those parameters and meanwhile send a message to the user informing him that a search is in progress.
After finalising the search, the UiPath flow will feed the result to the Wisevoice Chat Callback Activity, that will handle sending the response to the original Wisevoice conversation.
Read the Wisevoice documentation here.