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:       Good morning , sir . Here is the hotel's sauna room . What can I do for you ?  
 Person2:Yes . This is the first time I've come here . Could you please tell me something about it ?  
 Person1:        Sure Those who have heart disease or high blood pressure are not allowed to take sauna , for their sake .  
 Person2:Thank you for telling me about this . What should I do here ?  
 Person1:        First , change your shoes to slippers . Then walk up to the changing room to get prepared for a shower .  
 Person2:OK . How about after the shower ?  
 Person1:        After the shower , step into the washroom with birch switches , dip them in the warm water and briskly whisk them over your skin .  
 Person2:That sounds comfortable .  
 Person1:        Yes , then enter the bathroom , There is a stove tired with wood in the room , and on the top of the stove , there is a pile of stones , which keep the heat . Throw some water on the stones , and dry steam is given off . 

formal