Starting a conversation with Tact Assistant in Thread is the same as starting a direct conversation with another Thread user.
How to start a conversation with Tact:
1. Open Thread and Select "Timeline" view
2. Select the Plus icon
3. Select Direct Message
3. Search for Tact
4. Type a message to Tact to get signed in to your account Tact Account and select the link 'Please Log in to your Tact account'
5. Follow the steps to sign in to your Tact account
6. Message Tact to start the conversation