Listen to the whole passage
Listen to the whole passage once first, then practice sentence by sentence.
The first line is the other person opening the conversation; the "You" lines are suggestions for you to practice saying in this scenario (not a back-and-forth dialogue).
A store clerk
您好！请问您想买什么？
Hello! May I ask what you'd like to buy?
You
你好！我想买一件衣服，送给我哥哥。
Hello! I'd like to buy a shirt as a gift for my brother.
You
这件衣服多少钱？
How much is this shirt?
You
有大一点的吗？
Do you have a bigger size?
You
有别的颜色吗？
Do you have other colors?
You
我喜欢这个颜色。
I like this color.
You
好的，我要这件。
Okay, I'll take this one.
You
给你钱，谢谢！
Here's the money, thank you!