Choose the sentence expressing the main idea of the text.
I was waiting on the platform for the Bristol train when a lady asked me if I knew the time of the next train to Oxford. I often have to go to Oxford myself, so I knew. A few minutes later a man wanted to know whether the train for Bristol had already left. I knew that it hadn`t, so of course I told him. The man inquired why the train from Birmingham was late. I didn`t know but I told him it might be because of the line repairs. I couldn`t understand why all these people were asking me questions. Then I noticed that I was standing next to a big sign that said: «Information».