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:       Morning , Bob . Fancy meeting you here !  
 Person2:Morning , Jenny . Haven't seen you for ages !  
 Person1:        Well , I thought I'd come to see you , so here I am .  
 Person2:You did give me a surprise . How have you been ?  
 Person1:        Fine , just fine . And you ?  
 Person2:Not so well . I've come down with the flu .  
 Person1:        I'm sorry to hear that . Take care of yourself .  
 Person2:It's really great to see you again . How about a drink tonight ?  
 Person1:        Sounds wonderful . When shall we make it ?  
 Person2:How about seven ?  
 Person1:        OK .  
 Person2:I'll pick you up .  
 Person1:        Thank you . 

informal