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: Ah , ah , ah ...
Person2:All right , Bill.Here ' s your daily exercise schedule . You are to jog before breakfast .
Person1: Jog ?
Person2:Then , you are to walk to work .
Person1: Walk ?
Person2:Thirty minutes in gym at lunch time .
Person1: Oh no .
Person2:Use the stairs , never the elevator .
Person1: Oh , dear .
Person2:And three times a week , you can either swim , play racketball , or hand ball .
Person1: Oh no .
Person2:OK , you can stop now.It ' s time for the dance class .
Person1: Dance class ! I don't know how .
Person2:You will .
Person1: Oh ...
informal