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: Consider Input: Person1: Do you know that John isn't going to come back to our school ?
Person2:Really ? Why ?
Person1: He had moved and held a party on July 1st .
Person2:It's a pity that I was traveling around Europe at that time .
Person1: Even he's not coming back to school anymore , you still can call him and meet him on weekends .
Person2:You're right ! I will call him this weekend and meet him .

Output: informal

Input: Consider Input: Person1: Are you almost finished with my hair ?
Person2:I'm almost finished .
Person1: How much longer is it going to be ?
Person2:I'm done now . Do you like it ?
Person1: I absolutely love it .
Person2:You really like it ?
Person1: Yes , I truly do .
Person2:I'm glad you like it .
Person1: How much do I owe you ?
Person2:It's going to be $ 55 .
Person1: Here you go , thanks for everything .
Person2:Make sure and come back in a couple of weeks .

Output: informal

Input: Consider Input: Person1: Hello ! Let me introduce myself . My name is Nancy .
Person2:Nice to meet you , I'am Seven . I don't think I ' Ve seen you around before .
Person1: No , I just started working here at IBM , I am assigned sale department .
Person2:What do you do there ?
Person1: I main market reasearch , and you ?
Person2:I ' Ve beaning worked IBM for years . I am vested personnel file system , He is the after sale survise director . he such a nice boss , I like working for him .
Person1: Really ? I don't believe I would met him , is he here now ?
Person2:Yes , That's him over there-the taller , handsome one . Would you let me introduce you ?
Person1: Thanks , that's would be lovely . You'r right , he is kind and nice looking .
Output: informal