Definition: You are given a conversation between two people. 'Person1:' and 'Person2:' are used to separate their respective dialogues. You are required to assign a label 'formal' if there is an absence of emotion and a presence of questions anywhere within the conversation. If such pattern is not found assign the label 'informal'.
Input:  Person1:       Have you had enough time to look over the menu ?  
 Person2:Yes , we are almost ready to order .  
 Person1:        Let me remind you of the specials of the day , which are posted on the board .  
 Person2:Oh , that all sounds so good ! Can we get the sauce on the side ?  
 Person1:        Yes , we would be happy to prepare the food to meet your special needs .  
 Person2:I was wondering if you have any vegetarian choices .  
 Person1:        Yes , the roasted vegetable salad is good , and the portabella mushroom burger is also a good choice .  
 Person2:I think that I would like to order the broccoli noodles , please .  
 Person1:        That is an excellent choice , and I could bring you your salads now or bring them with your dinner .  
 Person2:Please bring our salads to us now . We are hungry ! 

informal