AIML and finite state machines

Hello everyone,

I'm new to AIML, so please be patient if my question has a obvious answer or so on.

I'm doing a little research to discover if there's a way of incorporate the concept of the finite state machines in AIML, in order to create a bot/character who answers in different ways depending on his internal state.

Is there a way to define this states directly with AIML, or another language is needed to define the states along with a different/hybrid parser?
Thank you!