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 are you worrying about ?  
 Person2:I am worrying about my husband .  
 Person1:        Where is he ? Is he in danger ?  
 Person2:You know , he is a taxi driver . He has to have his eyes peeled all the time when he drives , especially during the rush hour . 

formal