You will be given a definition of a task first, then some input of the task.
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: Mary , how was your date with john ?
Person2:it's ok . It seems we have a lot in common .
Person1: oh , really . That is great news . What does he look like ?
Person2:he is tall and slim , fair-haired .
Person1: sounds like he is pretty cute . What do you think of him ?
Person2:he is a nice guy and very considerate . I was impressed with how smart he was and he has a great sense of humor .
Output:
informal