A：Wang, I'd like you to meet my friend. Dou, this is Wang.
王，我想让你认识下我的朋友。窦，这是王。
B：Hello Wang. I'm Dou. Pleased to meet you.
你好，王。我姓窦。很高兴见到你。
A：Pleased meet you, too, Mr. Dou.
窦先生，见到你也很高兴。
B：Just call me Xiao Dou, Please.
叫我小窦就行。