Excuse me. Could you help me to take a photo? 打扰一下，你能帮我拍张照片吗？

My pleasure. 好的。

I wonder if you could help me with a picture. 您替我照张相好吗？

Excuse me, sir. I wonder if you could help me with a picture. 打扰一下，先生。您替我照张相好吗？

Yeah, I 'm glad to. 好的，我很乐意。