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:Yes , I am looking for a skirt . What's in fashion now ?  
 Person1:        This one is the latest . How do you like it ?  
 Person2:Well . Could I try it on ?  
 Person1:        Sure .  
 Person2:( A moment later ) It's cute.The color suits my complexion . 

informal