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:       It is so quiet here . I like the place . 
 Person2:Me too . 
 Person1:        I can't stand the loud noise in the city . 
 Person2:Yes , sometimes I can hardly get asleep at night . 
 Person1:        I hope I can stay here longer . 
 Person2:When will your vacation end ? 
 Person1:        The day after tomorrow . 
 Person2:You will go back tomorrow , right ? 
 Person1:        Yes , you are right . 

informal