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:       Name and examination number , please . 
 Person2:My name is Han Ran , number is 050920 . 
 Person1:        What part of the country do you come from ? 
 Person2:I ’ m from Living , Yunnan Province . 
 Person1:        Where is it ? 
 Person2:It's a very beautiful place in Southwest China . 
 Person1:        Do you have a big family at your hometown ? 
 Person2:Not very big . There are five of us — grandmother , father , mother , sister and I . 
 Person1:        Are you married ? 
 Person2:No . I'm still single . 

formal