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:       Who is Cindy ’ s husband ?  
 Person2:Cindy ’ s husband is Ron .  
 Person1:        How many children do Cindy and Ron have ?  
 Person2:They have two children-one son and one daughter-as well as one daughter-in-law and one son-in-law .  
 Person1:        Do they have any grandchildren ?  
 Person2:Yes , they have three grandchildren-one girl and two boys .  
 Person1:        Does their daughters get along well with her in-laws ?  
 Person2:Yes , she gets along with them quite well .  
 Person1:        Do they have a large family ?  
 Person2:Their family is very similar to Cindy and Ron ’ s family . 

formal