Chaining intents doesn't work as expected

Question

Say my custom skill is named Portal Entry. Here's what I need to do:

1. User: "Alexa, open Portal Entry"

2. Alexa: "Ok, would you like to perform task ABC or do XYZ?"

3. User: "Perform task ABC"

4. Alexa: "Ok, performing task ABC"

[...] executes function (couple of HTTP requests) [...]

when done:

5. Alexa: "Task ABC was performed successfully"

If in 3 user said "do XYC", it should say "Ok, doing XYZ", execute a different function, and when done say "XYZ is complete. Pretty simple, right?

So (4) is just a confirmation, like "Ok, got you, I'm gonna do what you asked me". To make alexa jump from Intent 4 to intent 5 without having the user say something, I found out I should use Chaining Intents (as a way to trigger intent 5 automatically after intent 4 is resolved). I've followed amazon's tutorial on Chaining Intents and added the following to IntentFour

handle(handlerInput) {
    const speakOutput = 'Ok, performing Task ABC!';

    return handlerInput.responseBuilder
    .addDelegateDirective({
    name: 'IntentFive',
    confirmationStatus: 'NONE',
    slots: {}
})
    .speak(speakOutput)
    .getResponse();
}

In my IntentFive I have this:

handle(handlerInput) {
    // executeFunction();
    const speakOutput = 'Task ABC was performed successfully';
    return handlerInput.responseBuilder
    .speak(speakOutput)
    .getResponse();
}

So as it is now, it should say 'Ok, performing Task ABC' and then say 'Task ABC was performed successfully.

Problem: it just jumps to IntentFive without saying what it's supposed to on IntentFour. So when I say 'Perform task abc' it says 'Task ABC was performed successfully'.

What am I missing? What's wrong with implementation described? Is there a better way to do that?

note: don't know if it's important but as amazon's tutorial recommended in order to have a dialog model "If you have at least one intent with a required slot, or you’ve enabled auto delegation, your skill has a dialog model", so I added a FooIntent with a required slot just to make it work, but I'm not using it at all.