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:       Hello , Mike , long time no see . How's everything going ?  
 Person2:Not bad . Thank you . You look great today . And how is your husband ?  
 Person1:        He caught a cold yesterday , but he feels much better now .  
 Person2:Well , I'm glad to hear that . Please give my regards to him .  
 Person1:        I sure will . Thanks . 

informal