Drupal 7 module: reservation system for beauty treatments

For an existing Drupal 7 website we need an additional module for booking different beauty treatments. This module should be able to: - book different beauty treatments into one appointment - take into account the available rooms - take into account that certain treatments are only possible in some rooms - take into account the duration of each treatment - take into account opening hours - take into account existing appointments - take into account non-confirmed appointments (assuming they are going to be accepted) - has to be fully translatable with the translate interface in Drupal Visitors of the website should be able to book a treatment. They have to fill in their data like name and phone number (required) and some optional fields like birthday. If they want they should be able to register (= returning customer) so they do not have to fill in the form over and over again. Also registered visitors should be able to review there upcoming appointment(s). But registering has to be optional. When a new appointment is booked, the administrator has to receive an email with all information about the appointment. After the reservation the administrator or an employee should be able to review the appointment in the backend. The administrator/employee than can choose a room for this appointment, or denies the appointment. Once accepted (or denied), the customer should receive an email. If a registered client changes his/her appointment, the appointment has to be reviewed again. The administrator/employee should also be able to put in reservations without the need for a confirmation, for example when a client calls for an appointment. The backend should include a page where all appointments of a selected day and selected room can be viewed. There should also be a possibility to block certain days for certain rooms or all rooms, when for example the beauty salon is closed or an employee is on holiday. The different treatments are already on the website (in a specific content type) with duration minutes already put in. Existing open-source modules may be used, but in the end we need a system that can handle the above conditions, without additional stuff so it will not be confusing for the people that will work with this system. *** Bonus points for providing a function where we can send emails to customers that have an upcoming birthday (for promotional reasons). We can provide a development environment with a copy of the website (foreign language). We encourage to develop in English, but as stated we need to be able to translate this module to another language. --- Extra info: You will need to send us an invoice once this project is completed.