Convert a 2 step form in 1 step form - bookingbuddy effect

I have a form with several fields that I divided in two steps, Now i need to simplify the form in only one step. Form contains a customer name field and a product name field. At this time those fields are choice list. Since the amount of fields is big, both fields contain lots of information so I would like to migrate those fields with a field with search function like the one is located in [login to view URL], in that page you input the name of a city and the field gives suggestions. Please write PM to let you know screenshots of actual form and to answer your questions or clarifications.