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:       What do you think about studying in the U . S . ?  
 Person2:Well , for many international students , coming to the United States and living here and studying can be quite a daunting experience , especially when finding a house on campus or off campus .  
 Person1:        Do you have any advice ?  
 Person2:I think first of all for first-time students , coming and living on campus in dormitories can provide a certain level of security .  
 Person1:        Anything else ?  
 Person2:Uh , when you live off campus , there might be a certain amount of flexibility in choosing roommates that you might not have when living on campus .  
 Person1:        I will think over your advice .  
 Person2:Well , of course , the choice is up to you . Good luck !  
 Person1:        I really appreciate your help . 

informal