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: Do you think I should ask Bob to help ? Will he come ?
Person2:No problem . You know him . He ' s the kind of guy that ' s always willing to go the extra miles .
Person1: That ' s right . But I have bothered him several times .
Person2:I bet he will come .
Example Output: formal

Example Input: Person1: Could I see the manager please ? I have a complaint to make .
Person2:Yes , I ' m the manager here . What can I do for you , Madam ?
Person1: Did you have the room checked before we move in ?
Person2:Which room are you in ?
Person1: 1808 . The toilet doesn ' t work properly . The water doesn ' t run in the shower .
Person2:I ' m awfully sorry to hear that . ( After checking ) I ' ll turn to it right away . I do apologize . We ' ll change your room to 2002 .
Person1: That ' s not bad . Thanks for your help .
Person2:It ' s my pleasure , Madam .
Example Output: informal

Example Input: Person1: How nice of you to come !
Person2:It's been a long time , hasn't it ? How have you been ?
Person1: Just fine , thanks.And you ?
Person2:I've never been better , thanks .
Example Output:
informal