If you need support from Yola please contact us via firstname.lastname@example.org or make use of our live chat service! We are working on a new approach to community-based support and during this transition period we are not adding any new threads to this forum. Many thanks to everyone who has participated over the years and we look forward to unveiling a new peer-to-peer support system soon!
If you are referring to the booking widget, it looks like they are using BookFresh (http://terminvereinbarung.1und1.de/). You can use them right now by copying and pasting their embed code into an HTML widget.
If you are referring to the form below it you can create a very similar one with the Yola form widget.