How to combine Rasa with Bot Framework?

I really like Rasa and have already created some fantastic demos with it.

I want to combine Rasa with Bot Framework together. Now I can give Rasa an utterance input and output some data with action. I want to use Bot Framework, and take Rasa as a service. How can I do that to send Rasa an utterance and get Rasa’s output in Bot Framework? Bot Framework ------utterance-----> Rasa --------output---------> Bot Framework

Thanks a lot.