Cases for demo video

[cecilia-donnelly]

For our screen-captured demonstration video, we should cover the following cases:

1. Searching for a client who already exists in the sample data, and correctly finding that client.
2. Searching for a client who does not exist in the sample data, and adding that client.
3. Searching for a client whose name does not exist in the sample data, but whose SSN does, and signalling that to the user.