Can I use this for 1-on-1 support or customer service chat?

I need a chat plugin to act as a support chat, for anonymous users, to do the following things:

1. Not require any login information at all. (guest chat)
2. Not act as a chat room, but rather a 1-to-1 chat.
3. Display when the employee is logged on and available. Otherwise, it should direct the user to a contact form/page.

Kinda like when you log into your bank account, and there a little sidebar option to start a chat with a customer service rep.