Dialogue

1. 我的钱包丢了。Wǒ de qiánbāo diū le.
I’ve lost my wallet.
If unfortunately your purse is stolen,you should know how to say “I’ve lost my bag”. So that someone can help you find it. In this case you can say 我的钱包丢了.
我的 wǒ de, my.
钱包 qiánbāo, purse or wallet.
丢了 diū le, lost.

2. 我的银行卡也丢了。Wǒ de yínháng kǎ yě diū le.
I’ve lost my credit card too.

Also you lost my credit cards. you can tell them 我的银行卡也丢了.
我的 wǒ de, my.
银行卡 yínháng kǎ, bank card.
也 yě, also.
丢了 diū le, lost.
Actually "了 le" here is a particle coming at the end of a sentence and indicating the completion of an action.

3. 那你赶快挂失吧。Nà nǐ gǎnkuài guàshī ba.
You should report the loss as soon as possible.
那 nà, then.
你 nǐ, you.
赶快 gǎnkuài, quickly.
挂失 guàshī, to report a loss.
吧 ba, is another particle coming at the end of the snetence and indicating the suggestion.

4. 一个星期以后来取。Yí gè xīngqī yǐhòu lái qǔ.
You can come to take it a week later.
How long can the card be completed. Usually it will take a week, and the workers in the bank would say一个星期以后来取.
一个星期 yí gè xīngqī, one week.
以后 yǐhòu, after.
来取 lái qǔ, to come to take it.