database design for online bus ticket booking with extra features -

I am trying to build an online bus ticket reservation system on a package base, where the ticket has some special features Tickets are included to see the place, just the ticket will be similar to all the passengers, but the price for other facilities may depend on passenger type (adult / hair / senior ...). There will be a table like the other_feature, passenger_type, feature_type, so I am confused how to add them to the reservation system, please appreciate any assistance. thank you in advanced!