Given the task definition and input, reply with output. 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'.

Person1: Frank ' s getting married , do you believe this ?
Person2:Is he really ?
Person1: Yes , he is . He loves the girl very much .
Person2:Who is he marring ?
Person1: A girl he met on holiday in Spain , I think .
Person2:Have they set a date for the wedding ?
Person1: Not yet .
informal