1. Open cassy.wiply.net. If you are not signed in, Cassy sends you to the Wiply login page: use your usual Wiply account.
2. Type your message in the box at the bottom and press Enter. To start a new line without sending, press Shift + Enter.
3. Keep talking in the same conversation: Cassy remembers everything said earlier in it.

New chat starts a fresh conversation. Your past conversations are in the side panel, and the home page shows the latest ones under Pick up where you left off.

While Cassy works on a longer answer, the Progress panel shows what it is doing: searching the web, reading a file, writing. See Follow Cassy's progress.