Ttykuu

I am new to programming , & have just started learning c++,python & java side by side. While working in java on making the railway ticket account program the problem arrives in the output the program is working properly when we enter 1 passenger is travelling but when we enter multiple ( 2 )or more than two passenger was travelling, In the case of first passenger it work's properly but for the second passenger it skip's the second string statement here is the main class.....
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 public static void main(String[] args) 
Scanner inpu=new Scanner(System.in);
String fi_name=null,li_name=null,cn_name=null,first_name=null,last_name=null,cnic_number=null;
int Age=0,passenger=0,i=1,age_name=0,age_price=0,total=0 ;
 System.out.println("Enter the number of Passenger Travelling");
passenger=inpu.nextInt();
passenger_attributes ob=new passenger_attributes();
while(passenger>=i)

 first_name=ob.fname(fi_name);
last_name=ob.lname(li_name);
 cnic_number=ob.cnum(cn_name);
 Age=ob.age(age_name);
 age_price=ob.age_checker(Age);
 System.out.println("passenger "+i+" First name is :=" +first_name);
 System.out.println("passenger "+i+" Last name is :=" +last_name);
 System.out.println("passenger "+i+" cnic number is :=" +cnic_number);
 System.out.println("passenger "+i+" Age is :=" +Age);
 System.out.println("passenger "+i+" total price ticket is :=" +age_price);
 total=total+age_price; 
 i++;
 System.out.println("the total price of all the passenger is :=" +total);
 
}

& that was my class program


 public class passenger_attributes 
 Scanner input=new Scanner(System.in);
 public String fname(String fi_name)
 
 System.out.println("ENTER PASSENGER FIRST NAME :=");
 fi_name=input.nextLine();
 return fi_name;
 
 public String lname(String la_name)
 
 System.out.println("ENTER PASSENGER LAST NAME :=");
 la_name=input.nextLine();
 return la_name;
 
 public String cnum(String cn_num)
 
 System.out.println("ENTER PASSENGER Cnic Number :=");
 cn_num=input.nextLine();
 return cn_num;
 
 public int age(int age_num)
 
 System.out.println("ENTER PASSENGER Age :=");
 age_num=input.nextInt();
 return age_num;
 

 public int age_checker(int Age)
 
 int price_age;
 if(Age<=12)
 
 price_age=500;
 return price_age;
 
 else if (Age<=15 && Age>12)
 
 price_age=1000;
 return price_age;
 
 else if(Age>15)
 
 price_age=1500;
 return price_age;
 
 else
 return 0;
 

 

My question is "How i could remove this logical error"?