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:       I feel like to wear my hair in this way . 
 Person2:Oh , it's really popular these days . 
 Person1:        Do you think it's suitable for me ? 
 Person2:Honestly speaking , I think the one next to it suits you better . 
 Person1:        Even though I really like it , it's just too modern for me . 
 Person2:That's not true . Look over there ! That lady chose the same one and she is surely older than you . 
 Person1:        Okay then . And I also want to have my hair colored . 
 Person2:Which color do you like ? 
 Person1:        Claret-red . 
 Person2:Nice choice . 
 Person1:        How long will it take ? I hope it won't be too long . 
 Person2:I hope not but it will take at least three hours . 
 Person1:        Now it's my son's turn to wait . 

formal