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:       When do you celebrate Thanksgiving ?  
 Person2:On the fourth Thursday of November .  
 Person1:        What do you eat on that day ?  
 Person2:People cook turkeys for Thanksgiving dinner .  
 Person1:        Anything else ?  
 Person2:Besides the turkeys , we'll also have other delicious food . Such as pumpkin pies , puddings , mashed potatoes , bread , a lot of fresh fruits and vegetables .  
 Person1:        I'm almost hungry . 

formal