Task: Identify the primary emotion conveyed in the tweet and assign it to either 'neutral or no emotion' or one or more of the provided emotions (anger, anticipation, disgust, fear, joy, love, optimism, pessimism, sadness, surprise, trust) that best capture the tweeter's mental state.
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
This tweet contains emotions: 
anticipation, optimism, sadness, trust