Excluding a label from a Google Apps Script - google-apps-script

Question

This is my first post :)
I am using a Google Apps Script that tracks e-mail from the last 7 days that have not had a response (basically tracks emails where my message is the last one).
This is the code here:
// This script searches Gmail for conversations where I never received a response
// and puts them in a NoResponse label
var DAYS_TO_SEARCH = 7; // look only in sent messages from last 7 days, otherwise script takes a while
var SINGLE_MESSAGE_ONLY = false; // exclude multi-message conversations where I sent the last message?
function label_messages_without_response() {
var emailAddress = Session.getEffectiveUser().getEmail();
Logger.log(emailAddress);
var EMAIL_REGEX = /[a-zA-Z0-9\._\-]+#[a-zA-Z0-9\.\-]+\.[a-z\.A-Z]+/g;
var label = GmailApp.createLabel("AwaitingResponse");
var d = new Date();
d.setDate(d.getDate() - DAYS_TO_SEARCH);
var dateString = d.getFullYear() + "/" + (d.getMonth() + 1) + "/" + d.getDate();
threads = GmailApp.search("in:Sent after:" + dateString);
for (var i = 0; i < threads.length; i++)
{
var thread = threads[i];
if (!SINGLE_MESSAGE_ONLY || thread.getMessageCount() == 1)
{
var lastMessage = thread.getMessages()[thread.getMessageCount()-1];
lastMessageSender = lastMessage.getFrom().match(EMAIL_REGEX)[0];
if (lastMessageSender == emailAddress)
{
thread.addLabel(label);
Logger.log(lastMessageSender);
}
}
}
}
The problem is at the moment, when the script runs the un-replied messages go into the "NoResponse" label which is great. However, when I delete the label from the emails that I don't need to follow up on, they come back up again when the script runs again.
My question is:
Would there would be a way to apply a label to messages that don't need to be followed up on, and then work that into the script, so that the script knows to exclude that label?
Any help would be fantastic :)
Thanks
Aidan

Answer 1

May be the script can apply two labels - NoResponse and Processed. You can remove the NoResponse label manually and yet the Processed label would stay.
The filter can be modified like:
threads = GmailApp.search("in:Sent -in:Processed after:" + dateString);