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:       Julie , is that you ?  
 Person2:Yes . And you're Paul , right ? Paul Hill ?  
 Person1:        Yes , it's me . And you're Julie Ashley . How are you ?  
 Person2:I'm fine . After ten years , you still look great !  
 Person1:        So do you ! How are you doing ?  
 Person2:Not bad . Let's find a table and sit down . We have a lot to talk about .  
 Person1:        Okay , let's sit over there . 

informal