Beginner Chinese - Asking for help and directions

I'm lost	Wo3 mi2 lu4 le.   我迷路了。
Can I help you?	You3 shen2 me xu1 yao4 wo3 bang1 ni3 de? 有什么需要我帮你的？
Can you help me?	Ni3 ken3 bang1 zhu4 wo3 ma?   你肯帮助我吗？
Where is the (bathroom/ pharmacy)?	(Xi3 shou3 jian1/yao4 fang2) zai4 na3 li3? （洗手间／药房）在哪里？
Go straight! then turn left/ right!	Zhi2 wang3 qian2 zou3! Zuo3/you4 guai3 wan1 dao4! 直往前走！左／右拐弯到！
I'm looking for john.	Wo3 zai4 zhao3 yue1 han4.   我在找约翰。
One moment please!	Qing3 deng3 yi1 xia4!   请等一下！
Hold on please! (phone)	Qing3 shao1 hou4!   请稍后！
How much is this?	Zhe4 duo1 shao3 qian2?   这多少钱？
Excuse me ...! (to ask for something)	Qing3 wen4!   请问！
Excuse me! ( to pass by)	Bao4 qian4!   抱歉！
Come with me!	Gen1 wo3 lai2!   跟我来！