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:       What can I do for you , Ma'am ?  
 Person2:I want to buy a cell phone for my daughter .  
 Person1:        How old is she ?  
 Person2:She is 17 . It's for her birthday .  
 Person1:        We have a new-fashioned cell phone especially designed for young girls . The brand name is Nokia .  
 Person2:Thanks , but I want to have a look at the Motorola's products .  
 Person1:        Sure . This is the one I will not hesitate to recommend . Its color and style is so attractive and also the quality is really reliable .  
 Person2:Sounds perfect . I'll take the pink one . Can you pack it for me ?  
 Person1:        Sure . By the way , here are some free adornments . Would you like one ?  
 Person2:Why not ? The Sweetheart pendant matches the cell phone well . I'd take this one .  
 Person1:        Have a seat over there . I'll pack it up for you right away .  
 Person2:Thanks . 

informal