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:       Do you have any siblings ?  
 Person2:Yes , I do . I am the oldest child . I have a sister and a brother . My sister is in college and my brother in high school .  
 Person1:        How do you get along with them ?  
 Person2:We get alone very well . 

informal