Hi, I have written a batch class where I would like to send an email to contact owner with the contact details created by lead conversion.

//Batch Class
global class LeadConversionEmail implements Database.Batchable <sObject>, Database.Stateful{
    //public List<Contact> conList {get;set;}
    global Database.QueryLocator start(Database.BatchableContext BC) {
        String query = 'SELECT Id, LeadSource, ConvertedDate FROM Lead WHERE ConvertedContactId != NULL';
        return Database.getQueryLocator(query);
    }
    global void execute(Database.BatchableContext BC, Lead[] scope) {
        List<Contact> conList = new List<Contact>();
        for(Lead ld : scope) {
            conList.add([SELECT FirstName, LastName 
                         FROM Contact 
                         WHERE Id IN (SELECT ConvertedContactId FROM Lead)]);
        }
    }
    global void Finish(Database.BatchableContext BC) {
       messaging.SingleEmailMessage email = new Messaging.SingleEmailMessage();
        String body = 'FirstName ' +conList.FirstName+ 'LastName ' +conList.LastName+ 'done'; 
    }
}

I am getting errors at body saying Variable does not exist. Can you help me resolve the problem and how to send email to contact owner.

Thanks in Advance.