RE: Messanging Interface

For a link to your bot enter a "Subdomain" in your bot's Edit Details from its main page.
This will give you your own URL to chat with your bot.

To customize the interface click on your bot's Embed button. Any changes your make will be reflected in the subdomain.

I configured your bot "MR. Raftaar" with a subdomain and unclicked the avatar and speech.
The bot must be public to be given a subdomain.