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: @rickygervais my first time in Slough so checked out the new station floor #sad #LifeOnTheRoad
This tweet contains emotions: 
sadness