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: I couldn't wait to meet you in person .
Person2:Me , too . I've heard so much about you .
Person1: Same here .
Person2:I was looking forward to your arrival .

Ex Output:
informal

Ex Input:
Person1: What's taking you so long ?
Person2:Don't worry . I'm almost finished .
Person1: I need you to hurry up .
Person2:All right . I'm finished .
Person1: I think there's more you need to do .
Person2:What do you mean by that ?
Person1: My hair looks awful .
Person2:What don't you like about it ?
Person1: I just don't like my hair .
Person2:I'm sorry that you don't like it .
Person1: I won't be paying you for this .
Person2:I'm sure we can work something out .

Ex Output:
informal

Ex Input:
Person1: Hi , Charles . What's the matter ?
Person2:Oh ! ! My car isn't working . I'm waiting for a tow-truck .
Person1: Do you have a ride home ?
Person2:Yes , my wife is coming to get me .
Person1: That's good . Do you live near here ?
Person2:No , we live in the suburbs . What about you ?
Person1: I live downtown , with my parents .
Person2:Do you have a car ?
Person1: I don't need a car . I walk to work .
Person2:You're lucky !

Ex Output:
informal