You may rest assured that shipment will be effected within the time limit (stipulated in the contract). But there is also one point I’d like to stress.
你们尽可放心，我们会按照合同期限及时交货。但我也有一点想强调一下。
I hope this will mark the beginning of long and stable business relations between us.
我希望这标志着我们之间长期稳定的业务关系的开始。
We’ve had a very happy start, and I believe this can lead to more substantial businesses between us.
我们有了一个非常愉快的开端，我相信这能带来我们之间更多的交易。
We shall be grateful for prompt delivery as the goods are needed urgently.
因为急需这批货物，请立即交货。