Excuse me,can Iask you a question打扰一下我能问你一个问题吗?

如果不是在街上随机采访把前面的半句换成hello,thank you for your coming感谢你的到来

简单的致谢: Thank you for speaking with me/us today.

寒暄问候：How are you doing today?

结尾：

过度到结尾，让被采访者知道你已经问完了所有的问题: I have asked all questions on my list.

让被采访者补充他/她想说的，但是你还没有问到的。比如：Besides what we have discussed, is there anything else you want to share with us?