I am trying to implement the strategy design pattern in the below snippet using Java 8 .Looking for better ways to implement?

I have below service implementation :-

package Java8.controller;

import java.util.function.Function;

public class ServiceImpl implements ITicket {

    Function<Integer,Double> ticketCal;

    public ServiceImpl(Function<Integer,Double> ticketCal){
        this.ticketCal= ticketCal;
    }

    @Override
    public double calculateFare(int quantity) {
        return ticketCal.apply(quantity);
    }

}

Below are the strategies that I have created :-

Recliner ticket strategy :-

package Java8.controller;

import java.util.function.Function;

public interface ReclinerTicketStrategy {

    default Function<Integer,Double> reclinerTicketStrategy(){

        return (noOfTickets)->{
            return noOfTickets * 200.00;
        };
    }
}

VIP Ticket strategy :-

package Java8.controller;

import java.util.function.Function;

public interface VipTicketStrategy {

    default Function<Integer,Double> vipTicketStrategy(){

         return (noOfTickets)->{
             return noOfTickets*400.00;
        };

    }
}

Below is the main class which is using the strategy :-

package Java8.controller;

public class Main implements ReclinerTicketStrategy {

    public Main(){

        ITicket ticketsVip = new ServiceImpl(reclinerTicketStrategy());
        System.out.println(ticketsVip.calculateFare(5));

}

    public static void main(String args[]){
        Main main = new Main();
    }


}

My question is whether is this the correct way of housing the strategy function in the interface as a default method? OR are there better ways to have it?