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: Lisa , I'm home .
Person2:How was your day ?
Person1: Pretty good . I've made a few friends already .
Person2:Anybody I know ?
Person1: Well , Pam Franklin lives next door to us . By the way , can I go to her house this Saturday ?
Person2:Of course . You didn't have to ask me .
Person1: That's what Pam said .
Person2:Just don't stay out too late .
formal

Person1: Are you going to the party on Saturday ?
Person2:I was thinking about it . Are you ?
Person1: Yeah , I heard it's going to be a lot of fun .
Person2:Really ? Well , what time does it start ?
Person1: It starts at 8
Person2:Well , who all is going to be there ?
Person1: Everyone from school .
Person2:How do you know it's going to be so fun ?
Person1: This party is going to have a DJ , food , and drinks .
Person2:Wow , that does sound like it's going to be fun .
Person1: So am I going to see you at the party ?
Person2:Yeah , I will be there .
informal

Person1: Can you study with the radio on ?
Person2:No , I listen to background music .
Person1: What is the difference ?
Person2:The radio has too many comerials .
Person1: That's true , but then you have to buy a record player .
formal