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:       Something wrong ?  
 Person2:Yes . My car is having problems .  
 Person1:        What's wrong ?  
 Person2:It won't start .  
 Person1:        Do you want me to take a look ?  
 Person2:No , thank you . I think I can handle it .  
 Person1:        Well , if you change your mind , let me know .  
 Person2:I will . Thanks . That's sweet of you .  
 Person1:        No problem .  
 Person2:I might need some tools though . Do you know where I can get some ?  
 Person1:        Sure . I have all kinds of tools . Just ask . I ’ ll be happy to get them for you .  
 Person2:Thanks . That would be very helpful .  
 Person1:        Anything for you . Seriously , I don ’ t mind helping .  
 Person2:OK . If you really insist , I could always use the company . 

informal