Create a Step in Flow Builder that Notifies User all Agents are Busy During Open Hours

We have configured business hours and are using the business hours steps in our flow builder. However, our team may not always be available during business hours. If all the agents have reached their maximum messaging ticket capacity or if we have a team meeting or if people are out sick, we'd like to be able to notify a customer that no agents are available and they are welcome to leave and a reply will appear both in the widget and their email as soon as possible.

We'd like this to happen one of two ways:

1) Before the transfer attempt is made during open hours

OR

2) After the user has waited for X seconds for an agent to answer their "open" hours transfer