David Watt ,一家网上书店的服务经理,他在回复客户写来的一封投诉信。请按照调解信的要求,将下面给出的五句话填入文中空白处,使该信内容完整。 ◆ We assure you that this will not happen again ◆ We look forward to serving you again ◆ Thank you for your letter of March 10 th ◆ Yours faithfully ◆ We agree that the usual high standards of our services were not met in this instance An Adjustment Letter Dear Li Yang, 1 . I would like to apologize for the error made by our bookstore. 2 . That was caused by an unexpected malfunction( 故障 ). We understand how disappointing it can be when your expectations are not met. 3 . We have dispatched the new items. 4 . 5 , David Watt