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:       Good morning , Mr.Jones !  
 Person2:Good morning , Miss Bell !  
 Person1:        Nice to see you again .  
 Person2:Nice to see you too . It's been a long time .  
 Person1:        How is everything ?  
 Person2:Just fine , and you ?  
 Person1:        Quite well , thank you .  
 Person2:Did you drive yourself to the airport ?  
 Person1:        No , I was driven by my husband .  
 Person2:Did someone meet you at the airport here ?  
 Person1:        Yes , thanks .  
 Person2:Is this where we'll be holding the meeting ?  
 Person1:        No , the meeting will be held on the fourth floor . 

informal