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:       Hi , Tina , it's Joe .  
 Person2:Hi , Joe .  
 Person1:        What's the weather like there today ?  
 Person2:It's really cold . It snowed all day and the school closed early .  
 Person1:        What's the temperature ?  
 Person2:It's 20 degrees below zero now . It was even colder this morning .  
 Person1:        Have you heard what the weather is going to be like tomorrow ?  
 Person2:I was watching the news a little earlier . They said it's probably going to snow tomorrow .  
 Person1:        I really don't like the winter . I wish it were summer .  
 Person2:Me too . How's the weather where you are ?  
 Person1:        It's not too bad , but it's pretty cold here too . I heard it's going to be a little warmer tomorrow . 

formal