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:       Is there anything I can do for you ?  
 Person2:I want a chemise .  
 Person1:        You have really good taste . It's the best seller right now .  
 Person2:Could I try it on ?  
 Person1:        Sure .  
 Person2:Well . It's not my taste . Would you please bring me a short sleeve ? 

formal