TrainTicket data storing smart contract

gistfile1.txt

pragma solidity 0.4.18 <= 0.6.12;

contract TrainTickets{
    string _from;
    string _to; 
    string travel_date;
    string class;
    string customerName;
    int phone;
    int amt;
    
    
    function TrainTickets(string new_from, string new_to, string newtravel_date,
                          string newclass,string newcustomerName, int newphone,int newamt) public {
        
        _from = new_from;
        _to = new_to;
        travel_date = newtravel_date;
        class = newclass;
        customerName =newcustomerName;
        phone= newphone;
        amt =newamt;
    }
    
    function getTrainTickets() public view returns(string,string,string,string,string,int,int) {
        return(_from, _to, travel_date, class,customerName,phone,amt);
    }
    
    function setTrainTickets(string new_from, string new_to, string newtravel_date,string newclass,int newamt) public{
        _from = new_from;
        _to = new_to;
        travel_date = newtravel_date;
        class = newclass;
        amt = newamt;
    }
}