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:       Amanda , how do you like this peaked cap ?  
 Person2:Didn't you say you want to buy a top hat ?  
 Person1:        But I think this one fits me Well . Why don't you try on the sombrero in black ?  
 Person2:I don't like caps at all . 

formal