Is there a more direct/efficient way for a skip button?

I am currently working on a information request flow. The information needed is subdivided into 2 parts: the contact information (required) and some more details which are not necessary but add value to the request.

This is the flow right now: The user clicks on the request button and the 2-step pop-up opens. In the first step he can chose to directly send his request without additional information.

My question to you is: is this the best way to enable the user to skip the last step or is it a problem that he does not know what he is skipping? Are there some good alternative flows I did not think of?

Addition: The requests without details also have a great value.