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'.

Ex Input:
Person1: So , is L . A . all it's cracked up to be ?
Person2:Well , the stereotype in the movies is that L . A . is a frivolous town with a lot of flaky people . I guess , in the back of my mind , that's what I expected .
Person1: And , is it what you found ?
Person2:Well , it is and it's not . The city of L . A . is much bigger and more diverse than I had expected . There are people here from all over the country and all over world , like New York . I've heard people say that in L . A . , everyone is from somewhere else . Tha's partly true . So , I've met all kinds of people here . What I'm realizing is that the picture of L . A . that's in movies only represents a small segment of the city .
Person1: You're right . Life isn't always like the movies .

Ex Output:
formal

Ex Input:
Person1: Oh , my god . How can you stand living in such a messy dorm ?
Person2:Our place is spotlessly clean , compared with others .
Person1: Have you even tried to clean it once since you moved in at the beginning of the semester ?
Person2:In fact , I just swept the floor three days ago .
Person1: I think we need to restart the dormitory sanitation inspection system .
Person2:I bet nobody will care about it .

Ex Output:
informal

Ex Input:
Person1: The hotel is full tonight . we will need to find a new place to stay .
Person2:Maybe it's just a blessing in disguise . I've been wanting to try a new place anyway .

Ex Output:
informal