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:       Hi , Nancy.How are you doing ?  
 Person2:Hi , Tom.Want a cup of coffee ?  
 Person1:        Not right now . I've got to get another car and my old one is blown up .  
 Person2:Oh , hey , did you look in the classified ads ?  
 Person1:        You mean used car ?  
 Person2:No , Ah ... single sellers .  
 Person1:        Well , yeah , but I'd be getting somebody else's problem .  
 Person2:Uh huh.How about a used car ? They've got good ones now .  
 Person1:        It's the same kind of deal though , you know , you never know what you're going to get .  
 Person2:Oh , hey , how about a new car ? They've got easy loans now.You ' d feel so good driving a new car .  
 Person1:        Let's look at them all.Have you got a paper there ? 

formal