Dear Sir Or Madam, as a regular passenger of your train, I am completely disappointed to find that the service you provide is far from satisfactory.

尊敬的先生或女士，作为贵列车的一位常客，我很失望地发现贵方提供的服务远远不能令人满意。

youdao

Dear Sir Or Madam, as a regular passenger of your train, I am completely disappointed to find that the service you provide is far from satisfactory.

尊敬的先生或女士，作为贵列车的一位常客，我很失望地发现贵方提供的服务远远不能令人满意。

youdao