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'.

Example Input: Person1: What is the weather like today ?
Person2:It stops snowing , but there's a bit wind .
Person1: And the streets are covered with ice . Do you know what the temperature is today ?
Person2:I missed today's weather for cast in the radio
Person1: It seems 10 degree below zero at least . I don't mind the cold weather , but do hate when it get slippery .
Person2:The ice is soon be thick for skating . I'm so fine to want a sport
Person1: That's fine . let's go skating together tomorrow .
Example Output: formal

Example Input: Person1: Here ' s a letter for you .
Person2:Let me see it .
Person1: Who ' s the letter from ?
Person2:It ' s a letter from UCLA about my acceptance .
Person1: Read it !
Person2:UCLA accepted me !
Person1: Really ?
Person2:I ' m not joking . I got accepted !
Person1: I ' m so happy for you !
Person2:UCLA was my second choice , but I ' m happy knowing I ' Ve been accepted .
Person1: I am really proud of you .
Person2:You have no idea how proud I am of myself .
Example Output: informal

Example Input: Person1: Hi ! Tom . Fancy seeing you here It's a nice party isn't it ?
Person2:Yeah . Well it's quite some days since we were together last summer.How is everything going ?
Person1: Quite well . I got my MA degree two weeks ago .
Person2:Congratulations !
Example Output:
informal