请为下边这封站内信,选择一个合适的主旨。( )Dear friend,We appreciate your purchase from us. However, we noticed that you haven’t made the payment yet. This is a friendly reminder to you to complete the payment transaction as soon as possible. We are waiting for your instant payment. The earlier you pay, the sooner you will get the item. If you have any problems making the payment, or if you don’t want to go through with the order, please let us know. We can help you to resolve the payment problems or cancel the order.Looking forward to hearing from you soon. Thanks again!