Hi,
It is because you did not make contact form correctly.
Please use following css code in theme options panel 's css code field.
#sidebar input, #sidebar textarea { max-width: 100%; }
http://prntscr.com/ngj0qn
Regards, C-Themes
I replaced the booking form with the inquiry via wpcf7, however you can see it is not fitting in the content - can you advise how I would fix this please?