To book appointment in simple appointment booking widget you have to follow the below steps !
Step 1: Select service that you want to book appointment
Step 2: Select date and time for the appointment
Step 3: Enter your details for booking appointment, else if your are an existing customer then click on existing customer and enter your email address to book appointment.
After booking you get a success message of chosen time slot and selected service details.Using “Book Another Appointment” button you can schedule back to back appointment.