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: Who is responsible for the accident ? Is it Tony ' s fault ?
Person2:No . I don ' t suppose he ' s to blame . The man in the other car made a big mistake .
Person1: You mean Tony is the victim ? No , I don ' t think so . He ' s equally responsible because he tried to overtake you .
Person2:Yeah . I think everyone should go easy on driving .
formal

Person1: Nice and warm again , isn ' t it ?
Person2:Oh , it ' s lovely . Think of the nasty weather we had last week .
Person1: How are you these days ?
Person2:Fine , thank you . And you ?
Person1: Fine today , though a bit under the weather last week .
informal

Person1: May , look , what's that in the cage ?
Person2:Don't you know that ? It's panda .
Person1: Of course I know . I just can't see it very well .
Person2:OK , then put on your glasses , and do you know what does the panda eat ?
Person1: Of course , Bamboo !
Person2:That's right .
Person1: I also know they are given to other countries as gifts for friendship .
Person2:You sound quite knowledgeable .
Person1: Not really , panda is my favorite animal .
Person2:Actually , it likes milk too .
Person1: Any way , in a word , panda is our friend .
Person2:Do you know other famous animals in the world ?
Person1: Yeah , let me think , the kangaroo and koala bear from Australia are very famous .
Person2:That's right . OK , let's move on .
informal