Custom WordPress Plugin RESERVATION / BOOKING

I need a custom WordPress Plugin with the following functionality: Outline Plugin required to allow customer to chose an offer, make a reservation and pay. Data needs to be held in admin view to allow admin to confirm/amend bookings. After action, customer receives confirmation email. Think of a light version of an airline site! You can use an existing plugin and customize it if you wish. Requirements BACKEND - Offer to be set up in plug in (price, etc) - email confirmation / automation - needs to work with external payment gateway - easy overview for reservations FRONTEND - To work as shordcode or similar in posts/pages - calendar required for customer to pick "wish date" - personal details need to be recorded - email confirmation / automation - needs to work with external payment gateway - needs to support WPML Language Plug-In Other Site already set up, CSS and styling will be done by me, so only coding is required. IMPORTANT PLEASE have a look at the brief and understand the requirements before bidding. The freelancer to win this must be good in english to communicate with, meet the deadline and be able to communicate well in order to build this project well. PRICE : I'm OK to negotiate the price, what I want is quality work.