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:       Can you tell me a little about Paris ?  
 Person2:Sure . What do you expect to know ?  
 Person1:        I want to see some of the famous places like Eiffel Tower , the Seine River ...  
 Person2:And you shouldn't miss the Louvre Museum . You can stay there for at least a whole day .  
 Person1:        That's a good idea . I almost forget it.What else ?  
 Person2:The night life there . It's so romantic !  
 Person1:        Oh , wonderful ! How is the weather ?  
 Person2:I went there in August , and it was hot . But I was told autumn is the best season .  
 Person1:        Sounds exciting . I can't wait . 

informal