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:       I'd like to order room service to room 927 , please .  
 Person2:How can I help you ?  
 Person1:        I'd like to two roast beef sandwiches and one fruit salad , please .  
 Person2:Will that be all , sir ?  
 Person1:        No , could I also get some extra towels and soap too ? We went to the pool today and used up our two clean towels .  
 Person2:I'll have someone bring that up right away . How would you like to pay for the dinner ?  
 Person1:        Just put it on with the rest of my hotel bill .  
 Person2:All right , sir . You should receive your dinner in about ten minutes . 

formal