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:       Oh that ’ s a lovely necklace .  
 Person2:Thank you . My husband gave it to me .  
 Person1:        Oh I didn ’ t know you were married .  
 Person2:Yes I am . I got married five years ago .  
 Person1:        Oh I see . That ’ s nice . Did you meet your husband at work ?  
 Person2:No , we met at university . 

informal