Andy, oh my God. I can't believe it. What are you doing here? I thought you're in Singapore.
安迪,我的天,竟然在这里遇见你。你在这里干什么?我以为你在新加坡。
I've got a problem and as I don't know what to do I thought I'd write to you and ask for your advice.
我有一个问题,因为我不知道该怎么办。我想我最好写信给你,征求你的意见。