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:       What a beautiful day !  
 Person2:It is really gorgeous out today . I remembered the weatherman said it is supposed to rain .  
 Person1:        I heard that it's supposed to get up to 90 degrees Fahrenheit today .  
 Person2:Really ? That's unusual for October , isn't it ?  
 Person1:        Well , you could never tell about the weather here in New York .  
 Person2:Yes , that's true . Still , it's hard to believe . Yesterday our high was only 50 degrees Fahrenheit . 

informal