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:       The weather is really miserable . It has been raining hard all day long .  
 Person2:Yes , it's so cold .  
 Person1:        Do you think the rain is going to let up soon ?  
 Person2:Yes , I think so . The rainy season will be over soon .  
 Person1:        How long does the rainy season last ?  
 Person2:About two months .  
 Person1:        I can hardly stand these wet and cold days . It seems that it doesn't bother you very much .  
 Person2:I'm used to this kind of days .  
 Person1:        But I prefer warm weather .  
 Person2:Spring will come soon . And we will have some pleasant weather then .  
 Person1:        I hope so . 

informal