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: ORG ! It must be so late where you are . What time is it ?
Person2:just after 2 am .
Person1: what's wrong ? Can't sleep ?
Person2:nope , actually I was waiting for you . I have something big to tell you .
Person1: really ? What is it ?
Person2:I have an offer to work for a company in your city today ?
Person1: I can't believe it ! Is it real ? You're moving here ?
Person2:I haven't accepted the position yet and with the upcoming holiday I think it's the perfect chance to visit the city and take a good look at the company before deciding . If you have time I think we c
Person1: just give me the dates and I'll make sure I'm free . You know after all these chatting online , it will be great to meet you in real life . I look forward to seeing you soon !
Person2:me too . But I think I am going to bed now . my head is getting heavy . Have a nice day there !
Person1: thanks . This is so exciting . Sleep tight and sweet dreams !
Person2:talk to you later .

Ex Output:
informal

Ex Input:
Person1: Are you free tomorrow , Sam ?
Person2:Yeah , what's up ?
Person1: I'm going to go hiking . Do you want to join me ?

Ex Output:
formal

Ex Input:
Person1: I heard you were on a date last night ! So , how did it go ? I want all the juicy details !
Person2:Um ... well , actually , we had a fantastic time last night . He was ... amazing !
Person1: Okay , now you really have to fill me in . What ' s he like ?
Person2:He ' s really good looking , he ' s quite tall , around 6 ' 1 " , he ' s in his early thirties , and he ' s got the most beautiful dark brown eyes ...
Person1: He sounds hot ! What does he do for a living ?
Person2:You know what , this is the best part . David is a junior investment banker at Fortune Bank , so he ' s got a great career path ahead of him !
Person1: Hold on a sec , his name is David ?
Person2:Yeah ?
Person1: That ' s my brother !

Ex Output:
informal