Currently all tour requests expire if they do not get approved within 4 hours. Our property managers do not check ShowMojo that frequently and claim ?

Currently all tour requests expire if they do not get approved within 4 hours. Our property managers do not check ShowMojo that frequently and claim that some requests that come in at night are cancelled by the next morning if they are not able to approve it overnight. Please let us know if there is anyway to change this setting or if you can make a change to how this works. Thanks!