How to display the Mysql value out of the function in nodejs

Question

I want to return a mysql value,and that value is stored in varible of out of the query

 

This is My code : 

 

if (intent.intent==='Sales-1'){

var rsp = con.query("SELECT Mobiles from Salestb", function (err,result, fields) {

if (err) throw err;

Object.keys(result).forEach(function(key) {

var row = result[key];

console.log(row.Mobiles);

});

});

response.output.text = "This is the modified Output :"+ rsp;

}

 

 But my output is [object Object] 

 

 

Actually I want to output like this : This is the modified Output : 123456(some vale)