I'd like to change this ticket to the first class我想把这张票换成头等车

今天的几个句子是有关坐火车的：1. I'd like to reserve a sleeper to Chicago.我要预订去芝加哥的卧铺。2. I won't check this baggage. 这件行李我不托运。3. I missed my train. 我没赶上火车。