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:       Sir , may I help you ?  
 Person2:Would you have my baggage sent up , please ?  
 Person1:        Sure . It's my pleasure . The elevator is right there ; your room is on the fifth floor . Here is your room .  
 Person2:Thank you very much . This is for your help . 

informal