Definition: 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'.
Input:  Person1:       Are your ready to go to the supermarket ?  
 Person2:Yes , are you ?  
 Person1:        I've got my money and my keys , so I'm ready .  
 Person2:You do know that it's absolutely freezing out , don't you ? I'd put a coat on if I were you .  
 Person1:        It wasn't cold out this morning .  
 Person2:Well , it's started raining since then . Look out the window ! It's pouring rain out there !  
 Person1:        Well , I guess we'd better grab our umbrellas then , as well .  
 Person2:Have a look outside for me . Does that look like hail to you ?  
 Person1:        It does , actually . Maybe we should wait for it to clear up before we go shopping .  
 Person2:That's a good idea . But maybe we should move the car so that the hail doesn't dent it .  
 Person1:        Ok . I'll go move the car if you turn the heat on . It's a bit chilly in here .  
 Person2:How long do you think this hailstorm is supposed to last ?  
 Person1:        I don't know . The weatherman didn't say anything about this in his weather report last night .  
 Person2:Maybe we should turn on the news in case it's supposed to get worse .  
 Person1:        I don't think we have anything to worry about . Do you want to put on a cup of tea as well ?  
 Person2:Good idea . That will help us to warm up .  
 Person1:        If I'm not back in ten minutes , come and find me .  
 Person2:Alright . I'll have a cup of tea waiting for you . 

informal