Trouble generating an Intent with delegateDirective from a TouchEvent handler (Alexa)

Question

I need to confirm deleting a task from a button event. For this reason, I want Alexa to ask for confirmation, and therefore I need to generate a DeleteTaskIntent from my code.

I have tried this:

return handlerInput.responseBuilder.addDelegateDirective({
    name: 'DeleteTaskIntent',
    confirmationStatus: 'NONE',
    slots: {
        idTask:{
            name: 'idTask',
            value: idTask,
            confirmationStatus: 'NONE'
        }
    }

}).getResponse();

In my TouchEventHandler, but after checking the request in the requestEnvelope, I see this:

request: {
    type: 'System.ExceptionEncountered',
    requestId: 'amzn1.echo-api.request.9c2cf5f4-2f2c-419c-898c-05bd5f096810',
    timestamp: '2022-02-23T11:30:08Z',
    locale: 'es-ES',
    error: {
      type: 'INVALID_RESPONSE',
      message: 'Directive "Dialog.Delegate" cannot be used in response to an event'
    },
    cause: {
      requestId: 'amzn1.echo-api.request.0494d80d-c6ac-41d6-b3a2-dffd97f427b5'
    }
}

And the error

{
    "name": "AskSdk.GenericRequestDispatcher Error"
}

also appears, which suggests that no handler can handle this case.

Any idea about what I'm doing wrong when trying to generate the Intent?