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:       Hello ! I'm Penny , I moved here just now .  
 Person2:Oh , Penny , I'm Leonard , glad to meet you .  
 Person1:        Nice to meet you , too . I thought I should come and say hello to you . I haven't known anybody .  
 Person2:It is hard to get used to a new place , isn't it ?  
 Person1:        Yes . Would you like to come here later to have a coffee ? Bring all your family .  
 Person2:We'd like to . Can you tell me when we go ?  
 Person1:        About 4 .  
 Person2:OK . Do you want us to bring something ?  
 Person1:        No , just come here .  
 Person2:OK , see you later .  
 Person1:        Bye . 

informal