I'm really sorry, but I seem to have misplaced your scarf.

真对不起，我忘记把你的围巾对丢在什么地方了。

I don't know how I can thank you enough.

我不知道怎样谢您才好。

Then you'll need small change.

那你需要换小零钱。

Not at all. Go ahead.

好，请吧。

If it's not too much trouble, I would like some help.

如果你不嫌麻烦的话，我想请你帮个忙。

I hope so.

我希望是这样。