diff --git a/app/responders/ropensci/reviewers_due_date_responder.rb b/app/responders/ropensci/reviewers_due_date_responder.rb
index 82953f8f..92a26f11 100644
--- a/app/responders/ropensci/reviewers_due_date_responder.rb
+++ b/app/responders/ropensci/reviewers_due_date_responder.rb
@@ -38,7 +38,7 @@ def add(reviewer)
         new_list = (list_of_reviewers + [reviewer]).uniq
         update_list("reviewers", new_list.join(", "))
         update_list("due-dates", add_reviewer_due_date(reviewer).join("\n"))
-        respond("#{reviewer} added to the reviewers list. Review due date is #{due_date}")
+        respond("#{reviewer} added to the reviewers list. Review due date is #{due_date}. Thanks #{reviewer} for accepting to review! Please refer to [our reviewer guide](https://devguide.ropensci.org/reviewerguide.html).")
         add_collaborator(reviewer) if add_as_collaborator?(reviewer)
         add_assignee(reviewer) if add_as_assignee?(reviewer)
         process_labeling if new_list.size == 2
diff --git a/spec/responders/ropensci/reviewers_due_date_responder_spec.rb b/spec/responders/ropensci/reviewers_due_date_responder_spec.rb
index 79cb959c..02fa4760 100644
--- a/spec/responders/ropensci/reviewers_due_date_responder_spec.rb
+++ b/spec/responders/ropensci/reviewers_due_date_responder_spec.rb
@@ -52,12 +52,12 @@
         due_date = (Time.now + 10 * 86400).strftime("%Y-%m-%d")
         expect(due_date.strip).to_not be_empty
         expect(due_date).to_not eq(@new_due_date)
-        expect(@responder).to receive(:respond).with("@xuanxu added to the reviewers list. Review due date is #{due_date}")
+        expect(@responder).to receive(:respond).with("@xuanxu added to the reviewers list. Review due date is #{due_date}. Thanks @xuanxu for accepting to review! Please refer to [our reviewer guide](https://devguide.ropensci.org/reviewerguide.html).")
         @responder.process_message(@msg)
       end
 
       it "should respond to github" do
-        expect(@responder).to receive(:respond).with("@xuanxu added to the reviewers list. Review due date is #{@new_due_date}")
+        expect(@responder).to receive(:respond).with("@xuanxu added to the reviewers list. Review due date is #{@new_due_date}. Thanks @xuanxu for accepting to review! Please refer to [our reviewer guide](https://devguide.ropensci.org/reviewerguide.html).")
         @responder.process_message(@msg)
       end