Originally Posted by flyerwma

There is a private message component.

You have to "follow" @DLAssist. Then you ask them (publicly, via tweet) to "follow" you. {You should set up all of that ahead of time, so you're not scrambling later on}. After that, you are able to send them a direct message which is private. I usually start off with "Re PNR xxxxxx...." These people are wonderful.