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:       Do you have any vacancies ?  
 Person2:Yes , we have a nice room on the sixth floor .  
 Person1:        How much is it ?  
 Person2:200 yuan a night .  
 Person1:        OK . Dose it include breakfast ?  
 Person2:Yes . And could I have your name ?  
 Person1:        Kate Green .  
 Person2:How long do you want to stay ?  
 Person1:        5 days . And could you send a bellboy to pick up my luggage ?  
 Person2:Sure . We'll be there in a few minutes .  
 Person1:        Could you keep my valuables ?  
 Person2:We'd like to . You may call the attendant if you need any help . 

formal