The context of the following conversation is Austin saw Bailey sitting there grinning at him. Austin grinned back at Bailey.:
Austin says What are you so happy about?.
The friend responds I'm not sure.  Maybe I'm happy about tonight?.
Austin responds What should we do?.
The friend responds I think we should go eat and then hit up a concert or a party..
Austin responds That sounds fun.  I'm game!.
The friend responds Awesome!  Let's go do this!.