I want to build a dynamic travel website.

This is a B2C travel website. Need Responsive and dynamic design. Customer shd be able to create their own itinerary in real time. The system shd guide and help the user to pick and choose activities, hotels, sightseeing based on interests and available time. The data will come via API as well as from a back office module which is already created. Need innovative and user friendly design and deliver a smooth user journey.