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: So did you get in touch with your brother ?
Person2:No , not yet . I'm really worried .
Person1: Well , it'd be foolish to call the police . He probably just went away overnight .
Person2:Maybe you're right . But I'm still worried .
Example Output: formal

Example Input: Person1: You look happy .
Person2:I am happy . I just bought a new car .
Person1: Wow ! Is it a good car ?
Person2:It ' s a great car . It ' s very comfortable and it goes really fast .
Person1: Was it expensive ?
Person2:Put it this way it wasn ' t cheap .
Person1: What colour is it ?
Person2:It ' s red and black .
Example Output: informal

Example Input: Person1: I told you that she is no fool .
Person2:I know she is quite an article , but I was not sure of her ability to cope with a boss .
Person1: She cannot get in Dutch with him . He is her boss , you know .
Person2:But most bosses are fools for woman .
Example Output:
informal