Dynamic greeting is now live in the assistant builder. Simply input your inbound greeting and your outbound greeting using the inputs and then reference the variable in the prompt: {{greeting}}
Now, when the call is inbound we will use the inbound greeting and when the call is outbound we will use the outbound greeting -- this way your assistant can be truly customizable by direction.
and yes, variables can be use in the greeting itself as well
Button: Dynamic Greeting
Merge Tag / Variable For Prompt: {{greeting}}