send replies instead of plain msgs

main.go

@@ -86,7 +86,13 @@ func (a *App) handleMessage(ctx context.Context, msg *tgbotapi.Message) error {
 		return fmt.Errorf("prompting: %w", err)
 	}
 
-	_, err = a.bot.Send(tgbotapi.NewMessage(chatID, response.Text))
+	_, err = a.bot.Send(tgbotapi.MessageConfig{
+		BaseChat: tgbotapi.BaseChat{
+			ChatID:           chatID,
+			ReplyToMessageID: msg.MessageID,
+		},
+		Text: response.Text,
+	})
 	if err != nil {
 		return fmt.Errorf("responding: %w", err)
 	}