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:       Hey , David . Would you like some drinks ?  
 Person2:OK . Shall we go to a bar ?  
 Person1:        Good idea . I like hanging out in bars at night .  
 Person2:Why ?  
 Person1:        For killing time and making new friends .  
 Person2:Don't you think it ’ s too noisy here ? The rock music ! I can hardly bear it .  
 Person1:        Calm down ! My little guy ! You'll get used to that after you come here several times .  
 Person2:Well , I'll try . Then what would you like to drink ? It's on me .  
 Person1:        I'd like a gin and tonic . 

informal