From Bright Pattern Documentation
< 5.19:Faq
• 日本語
Queue
Why would customers be placed in a queue?
If there are agents logged in and busy with other work, then the chat customers would wait in queue. If there are no agents skilled for chat logged into the system, then the "No Agents" branch of the chat scenario will execute and send the following text to customers: “Sorry, there are no agents available.”