Format Success message in Sitecore WFFM

Sample code snippet

using Sitecore.Form.Core.Pipelines.FormSubmit;

public class FormatSuccessMessage
    {
        public void Process(SubmitSuccessArgs args)
        {
            Assert.IsNotNull((object)args, "args");

            if (args.Form == null)
                return;

            if (condition1)
            {
               args.Result = "Result1";
            }
            else if (condition2)
            {
                args.Result = "Result2"
            }

            else
                args.Result = args.Form.SuccessMessage;
        }
    }

In Sitecore.Forms.config add reference of above class.

<successAction>
        <processor type="Sitecore.Form.Core.Pipelines.FormSubmit.SuccessRedirect, Sitecore.Forms.Core"/>
        <processor type="MyApp.FormatSuccessMessage, MyApp.Public"/>
</successAction>