Instructions: 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 nice and bright today , isn't it ?  
 Person2:Yeah . The autumn is marvelous here .  
 Person1:        How about winter ?  
 Person2:That's a hard time . The air is cold and damp , and the road is often icy .  
 Person1:        It's boring , right ?  
 Person2:Sure .  
 Person1:        Do you get much rain during the summer ?  
 Person2:Plenty . We never worry about lack of rainwater in our area .  
 Person1:        So you should bring an umbrella often .  
 Person2:That's right . 
Output:
informal