Modifying Contact Form

You guys have been so wonderful in your support, I hope that you can help me with the following. We need a “Contact” form in our site (www.acunyc.com) that will function as a “Make An Appointment with Us” form. It would need to have the basic contact form fields (i.e. name, telephone number, e-mail address, comments). But it would also either need an interactive calendar where people can choose dates or very simply two sections where people can choose the best days of the week and the best time slots for an appointment.
1. Can the “Contact” form in Enfold be modified with these things? If “Yes”, can you lend some pointers on how to do it?
2. Would you recommend a WordPress plugin instead that can be easily set up and does not charge a monthly fee to use this?
Many thanks for all your help!
Dan Globus