Computer scenes

[learningtowrite]

How do you display the communication between two people via instant messages and email in a script? Do you list the username as a character and the message below like dialogue? For example:

BUDDY123

hey, how are you?

SWEETGIRL

great, where have you been?

or should it be

BUDDY123: hey, how are you?
SWEETGIRL: great, where have you been?

The scene I am writing has a lot of this type communication in it.

[Witness]

Here's a link to the YOU'VE GOT MAIL SCRIPT:

http://sfy.ru/sfy.html?script=youve_got_mail

You'll see the example within the first few pages of the script.