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's raining outside , Catherine , it's too bad.What ' s the weather like in your hometown ?  
 Person2:It's very hot , the temperature is often over 40C .  
 Person1:        Do you like the weather in Seattle ?  
 Person2:Not really.But I like it in spring and fall . I don't like it in winter .  
 Person1:        Why ?  
 Person2:The winter is very rainy , I don't like the rainy day .  
 Person1:        What about the weather in Boston ?  
 Person2:I lived there for three years . I like summer but I don't like winter .  
 Person1:        Is it very cold in winter ?  
 Person2:Yes , it is.But it's nice in spring and fall . 

formal