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 we sold out all the newspapers for today ? 
 Person2:Yes . What a good job we have done ! 
 Person1:        Why are so many extra gifts left here ? 
 Person2:Many customers didn't want them . 
 Person1:        How about giving them to that old man ? 
 Person2:Good idea . 
 Person1:        By the way , do you think it's a good idea to give free gifts to attract customers ? 
 Person2:I'm not sure , but still it did attract a large crowds today . 
 Person1:        I think it should be more useful to hand out some fliers which is also cheaper . 
 Person2:But people can just throw them into the trash can as they turn around . 
 Person1:        That's true . 
 Person2:Anyway , let's just finish out job and get back home . 
 Person1:        Okay . How tiring the job is ! 

informal