Fastpath Chat Summary Report

Can someone please advise on the meaning and difference between following notifications in FastPath Reports:

No agent picked up request and User left the queue.

Thank you in advance.

Figured this out!

User left the queue - when customer left the chat queue prior to being replied to.

No agent picked up request - after 4-5 minutes in queue the customer’s chat request becomes invalid, and he is being dropped from the general queue.

So my next question will be:

Where can I change this time for customer disconnection from the queue (4-5min)?