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:       Hey , Susie , what health club do you belong to ?  
 Person2:Total Fitness , why ?  
 Person1:        Well , I ’ Ve been going to Athletic Express , but I don ’ t like it there .  
 Person2:Really ? Why not ? I hear it ’ s pretty good .  
 Person1:        The people don ’ t really work out there . They just stand around and talk all the time .  
 Person2:Oh , it ’ s one of those places .  
 Person1:        Yeah , is your club different ?  
 Person2:Well , they have different rooms . I lift weights by the pool where there aren ’ t so many people .  
 Person1:        Do they have a lot of equipment ?  
 Person2:Yeah , they have all the machines , a pool , and a steam room and sauna .  
 Person1:        Sounds nice . What about classes ?  
 Person2:The usual . Aerobics , kickboxing , yoga . They just started a Tai Chi class too .  
 Person1:        Wow , that sounds great .  
 Person2:Well , I have a guest pass . Why don ’ t you come with me tonight ?  
 Person1:        Really ? Thanks . I ’ ll stop by when I get off work .  
 Person2:Perfect . See you later .  
 Person1:        O . K . , see you . 

informal