Three way conference call (additional party)

I'm evaluating Amazon Connect and need to know if it allows at least three people to be conferenced together. I haven't found this feature to be available via the API or the Contact Flow Designer.

Example:

1. Customer calls.
2. Customer gets connected to an agent in a queue.
3. Agent adds an additional party (another agent or customer) to the conference.
4. One of the agents can leave the conference without dropping the other calls.

This is just one example but there are many cases where adding an additional party to a conference would come in handy.

Has anyone done this with Amazon Connect? And if it is not a supported feature, are there plans for releasing something like this in the near future?

Thank you