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:       John , you look pale . What happened ?  
 Person2:I stayed up last night .  
 Person1:        Did you have something on your mind ? You look so concerned ! Maybe I can help you !  
 Person2:Will , I'm under a lot of pressure . My manager is very pushy . He assigned me two projects . Now the deadlines are near but I have finished neither of them .  
 Person1:        Is there anything I can do for you ?  
 Person2:Well , I guess no one can help me but myself . For the moment , I just need someone to talk to so that I can relieve my stress .  
 Person1:        I know your feeling . Take it easy and say something to me if you like .  
 Person2:Oh , buddy , you are so kind . Thank you !  
 Person1:        Not at all ! 

informal