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:       Steve , you look pale . What happened ?  
 Person2:I didn't sleep a wink last night .  
 Person1:        Did you have something on your mind ? You look so concerned . Maybe I can help you .  
 Person2:Well , I am under a lot of pressure . My boss is very pushy . He assigned me three projects . Now the deadlines are near , and I still have not finished all of my projects .  
 Person1:        Is there anything I can do to help 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 . 

informal