Sorry to bother you, but can I have talk with you?
很抱歉打扰你，可是我可以和你谈谈吗？
Sorry to bother you, but could you give me a hand?
很抱歉打扰你，可是你能帮我一个忙吗？
Sorry to bother you, but I have a question to ask you.
很抱歉打扰你，可是我有个问题想问你。