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:       Are you enjoying your trip to New Orleans ?  
 Person2:Oh , yes . I really like it here .  
 Person1:        Would you like to do something tonight ?  
 Person2:Sure . I'd love to .  
 Person1:        Let's see . Have you been to a jazz club yet ?  
 Person2:Yes . I've already been to several clubs here .  
 Person1:        OK . What about an evening riverboat tour ?  
 Person2:Uh , actually , I've gone twice this week .  
 Person1:        So , what do you want to do ?  
 Person2:Well , I haven't been to the theater in a long time .  
 Person1:        Oh , OK . I hear there's a terrific show at the Sanger Theater .  
 Person2:Great ! Let's make a reservation . 

informal