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:       Have you finished washing clothes ?  
 Person2:I've finished my white clothes . I need to wash the rest .  
 Person1:        Well , when you do your darks , can you wash some of mine too ?  
 Person2:I can do that . Is there a special way you want them washed ?  
 Person1:        They need to be washed on the gentle cycle .  
 Person2:Do you have a lot of clothes that need to be washed ?  
 Person1:        There aren't many clothes , is your load big ?  
 Person2:My load isn't that big .  
 Person1:        If it's a problem , you don't have to do it for me .  
 Person2:I can do this for you . Don't worry .  
 Person1:        I greatly appreciate this .  
 Person2:Don't mention it . 

informal