I would like to know what the correct application of the word 'that' is. For example in the following sentence:<br/><br/>We confirm our client is aware <font color="#0000ff"><i>that</i></font> time is of the essence and we therefore request your response as soon as possible. <br/><br/>Or should it read: We confirm our client is aware, time is of the essence and we therefore request your response as soon as possible.