Contact Forms used in the chicago theme are included in the complete theme package downloaded from themeforest.net. You can find the contact form xml inside the dummy data folder.
To import the forms into your wordpress installation, you first need to install and activate contact form 7 plugin. You should receive a notification in your dashboard if the contact form 7 plugin is not activated.
You can click on the notification to install it.
To import the dummy data for Wish theme manually, you need to go to wordpress dashboard as an admin and click import page under Tools and click wordpress:
Then you can let it install WordPress importer plugin and activate it:
Now you can import the dummy data file from inside the chicao theme zip you downloaded in the dummy data folder and click Upload and Import:
After the process is complete you should have all the contact forms.