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: Shall we go for a drive today ?
Person2:It feels like there's going to be rain later .
Person1: Maybe you're right .
Person2:We'll go tomorrow .
Example Output: informal

Example Input: Person1: You ready ?
Person2:Am I ready for what ?
Person1: Are you ready to transfer to a new school tomorrow ?
Person2:Oh . Yes , I ' m ready to transfer .
Person1: You ' re not nervous , are you ?
Person2:I ' m very nervous .
Person1: Why are you nervous ?
Person2:I ' m not going to know anybody there .
Person1: That ' s not a problem .
Person2:That makes me nervous .
Person1: It ' s fun meeting new people .
Person2:I didn ' t think about it that way .
Example Output: formal

Example Input: Person1: I'm really tired of my job in the bank . I'm thinking about changing it .
Person2:Have you any definite idea ?
Person1: Not yet , what's your opinion ?
Person2:I think you'd better try an active job .
Example Output:
informal