If-Else statement only performing else

I am trying to create a chatbot for steam using SteamKit2. I have a predefined set of messages in a text document that the program can read off of, but I want it to say a specific response when the received message is not on this list. I tried using an if-else statement, but when I message the bot, it only replies with the else response, and not the predefined response.

while ((rLine = sReader.ReadLine()) != null) {
                string text = rLine.Remove(rLine.IndexOf('|') - 1);  //message | response
                string response = rLine.Remove(0, rLine.IndexOf('|') + 2) ;
                string realText = text.ToLower();

                if (callback.Message.Contains(realText) || callback.Message.Contains(text))
                {
                    steamFriends.SendChatMessage(callback.Sender, EChatEntryType.ChatMsg, response);
                    Console.WriteLine("Someone has messaged me, and I replied with an automated message.");
                    sReader.Close();
                    return;
                }else {
                    steamFriends.SendChatMessage(callback.Sender, EChatEntryType.ChatMsg, "I don't know what you mean. Could you maybe write it a bit differently? <3");
                    Console.WriteLine("Someone has messaged me, and it    wasn't on my auto-response list: {0}",callback.Message);
                    sReader.Close();
                    return;
                }

            }

Thanks.