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'.

Ex Input:
 Person1:       Hi , I want to see the Terra Cotta Warriors in Xi'an . Could you please remind me when we are arriving at that stop ?  
 Person2:Oh . You took the wrong bus . You need to take Bus 151 which goes the opposite direction .  
 Person1:        Oh , no ! What should I do now ?  
 Person2:Don't worry . You can get off at the next stop and walk across the street and take the Bus 151 to the opposite direction .  
 Person1:        Ok . How many stops do I have to go ?  
 Person2:About 15 stops .  
 Person1:        That is a long way to go . It is so kind of you to help me . Thank you very much .  
 Person2:My pleasure . 

Ex Output:
informal


Ex Input:
 Person1:       I don't think much of the film .  
 Person2:But I think it wasn't too bad .  
 Person1:        Really ? Do you like the story ? It's sheer nonsense !  
 Person2:It's exaggerated . Actually this sort of thing happens to everyone . 

Ex Output:
informal


Ex Input:
 Person1:       Hello !  
 Person2:Hi , Jenny ! Jason here . It's great to hear your voice again .  
 Person1:        Hi , Jason ! Long time no see . How's the hotel ?  
 Person2:It's pretty nice , but I'm going to start looking for an apartment soon . Hotel living is not for me .  
 Person1:        I know what you mean .  
 Person2:How about you ? When are you leaving for Berkeley ?  
 Person1:        I am leaving in two weeks .  
 Person2:So soon ! Well , I'd really like to see you again before you leave . Would you like to go out with me on Friday ? I'd like to take you to dinner and maybe a movie or something afterwards .  
 Person1:        Oh , I am sorry , Jason . I've already got plans for Friday evening . How about Saturday ?  
 Person2:Saturday is fine . I'll make dinner reservations for 7 o ’ clock . Is that ok ?  
 Person1:        7 is fine with me .  
 Person2:Great . I'll pick you up at six thirty .  
 Person1:        I'll be waiting . 

Ex Output:

informal


