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:       Julia , what's the weather forecast for tomorrow ?  
 Person2:It says a storm may come tomorrow .  
 Person1:        Oh ! I hate rainy days !  
 Person2:Me , too . I'm always in low spirits when it rains . Are you going out tomorrow ?  
 Person1:        Yes . I have to drive to Washington D . C .  
 Person2:What bad luck !  
 Person1:        Yeah ! But you know sometimes the weather forecast is not correct . Maybe tomorrow is a clear day . Who knows ?  
 Person2:Yeah , maybe you are right ! 

informal