A: Good morning, everyone. Allow me to introducemyself. I'm Li Hua.

大家早上好。请允许我自我介绍一下，我叫李华。

B: Hi, Li Hua. It's a pleasure to meet you.

你好，李华。很高兴认识你!

第二句：Will you please introduce me to that lady?

请你把我介绍给那位女士，好吗?

A: Excuse me, Miss Wang. Will you please introduce me to that lady? I want to know her.

打扰一下，王小姐。请你把我介绍给那位女士，好吗?我想认识她。

B: No problem. She is my sister.

没问题，她是我妹妹。

其他表达法：

May I ask your name?

请问你叫什么名字?

I think this is the first time we've met，isn't it?

我想这是我们第一次见面吧?