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:       Jane , the meeting is scheduled from 1:00 this afternoon . Have you made the necessary arrangements ?  
 Person2:Yes , Mr . Miller . We'll use the conference room on the third floor for the meeting .  
 Person1:        That's right . The meeting is very important . Where shall the guests be received before the meeting begins ?  
 Person2:In the dining room . It's spacious there .  
 Person1:        We'll have several foreign guests to attend the meeting .  
 Person2:I've arranged for an interpreter to be present . But it is said these foreigners could speak English .  
 Person1:        Really ? I'll also try to speak slowly . How would you arrange the guests ' seats , Jane ?  
 Person2:We've prepared name cards to be put on the conference table for guests to sit by . What time would you like refreshments served , Mr . Miller ?  
 Person1:        Well , after my report , there will be an interval for rest and refreshments .  
 Person2:All right , I see . 

formal