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,将下面方框中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