Possible informal English greetings depending on time

Question

I would like to code a simple text based game.

Instead of one standard greeting I would like to randomly choose one from a list of filtered greetings depending on the current time.

English is not my native language and I need your help to create such type of informal, friendly greetings.

For example, if user logged in at 1 am the program should greet like “Hello nightbird” or something similar.

The same things I’m looking for a friendly good bye.

Answer 1

Greets:
"Good Afternoon <user>"
"Good evening <user>"
"Hey, <user>, how is it this [Morning, Afternoon, Evening] ?"
(Informal)"Hey, what's good <user>! Let's get something done today."
(Informal)"I see we're starting a bit late today, hmm?"

Goodbyes:
"See ya later"
"It's been a pleasure serving you"
"You know you'll be back..."
"See ya, wouldn't wanna be ya!"
"Logging out...I need a break after what I've seen..."