S：Can I help you
M:Yes,please.I want a pants.
S:What color do you want?
M:Blue.
S:Here you are.
M:How much is it
S:Nine dollars.
M:Can it be cheaper?
S:OK.
M:How much is it
S:Eight dollars.
M:I'll take it!Thang you.
S:You are welcome.
能便宜点吗 英语这么说 Can it be cheaper?
也可以是
Can you give me a discount?你能给个折扣吗?你能算便宜一点吗?