1 Clear: The conversation between these guys straight foreword, easy to understand and clear.
2 Complete: The fast food staff can answer and give all of information that the customer want to know ( A special menu)
3 Correct: The Sentence is correct and don't have a blind point to make misunderstand situation.
4 Save Time: The conversation very safe time because they straight to the point and the sentence is not too long.
5 Good Will: Both guys made a Good Will conversation to each other. The staff always use a polite and clear sentence to the customer. That can increase a good feeling to the customer and make him pay the price of the food and let the staff keep the change.