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'.
--------
Question: Person1: You shouldn't have told her the truth.What can we do now ?
Person2:I'm sorry , It's all my fault .
Person1: You are always like this . I've told you many times not to tell her .
Person2:Sorry , I had no intention .
Person1: It's too late to say sorry now.Oh , what am I going to do ?
Person2:I know I was an idiot , But if there is anything I can do to make up , Please do tell me .

Answer: informal

Question: Person1: What do you think of your teacher ?
Person2:He's very strict with us .
Person1: And I hear he gives very good lectures .
Person2:Indeed . He's strict with himself , too . We can see every lecture of his is well-prepared .

Answer: informal

Question: Person1: I would like you to meet my family . Can you come to dinner next week at my parents ' place ?
Person2:Yeuks ! Do they know anything about me ?
Person1: Actually , I've told them a lot about you . They are excited to meet you .
Person2:I'm a little nervous !
Person1: I think you'll like them . My family is pretty laid back .
Person2:How Ay people will be there at dinner ?
Person1: Let's see . there's my mom and dad and my two brothers and one of my sisters .
Person2:That's good , I'm usually more comfortable in bigger families .

Answer:
informal