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:       Sheila , what time should we meet tomorrow ?  
 Person2:The usual time . Half past two in the afternoon .  
 Person1:        What place ?  
 Person2:The usual place . In front of the treasure house .  
 Person1:        And what should I wear ?  
 Person2:Your usual shirt and shoes .  
 Person1:        What are you going to wear ?  
 Person2:Nothing unusual , I ’ m afraid .  
 Person1:        Sheila , how about that fashionable blue dress ?  
 Person2:Good . That ’ s something unusual . 

informal