Classify the emotions found in the tweet "@pandaflo22 We are sadden by this because we always strive to bring the best service to our customer. We will always be here for you. CM". Select from the following: anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust. If the tweet is emotionless, reply "neutral or no emotion".
anticipation, optimism, sadness, trust