用英语应该怎么表达？

1. If the customer hasn't replied to your email, you could say something like, "Hello, I just wanted to follow up on the email I sent earlier. Did you have a chance to review the information? Is there anything else I can assist you with?"

2. If a customer has requested a product catalog but hasn't followed up after you've replied, you could say something like, "Hello, I hope the product catalog I sent was helpful. I wanted to follow up with you and see if you had any questions or if there is anything else I can assist you with."