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:       Excuse me , Sir , do you know what time it is ?  
 Person2:Oh , it ’ s almost eleven twenty .  
 Person1:        Thank you .  
 Person2:You ’ re welcome . The rain is quite heavy , isn ’ t it ?  
 Person1:        Yeah . I was in a hurry and I forgot my umbrella today .  
 Person2:I have one . We could share it . Which way are you going ?  
 Person1:        Oh , that ’ s very kind of you . I am going to the Garden Hotel .  
 Person2:I am going there , too . We can walk together .  
 Person1:        Sure . 

formal