I ran logistics for our company for a number of years and holy hell , thirdparty dispatch drove me bananas . After two years I created a bulletproof system Every appointment was made by email and a printout of that email was close at hand when the driver showed up more than an hour early . I always offered the crazy early driver a fresh cup of coffee if they wanted it . Not everyone did , but after a while you start to recognize who drives which truck . I promised to fit the early in as quickly as I could and did my best to keep that promise . And if anyone lost their cool and tried to play the dispatch said you said . game I just handed them the printout . I ' m always impressed to see the drivers smiling , given the grief they get .