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 wonder if you can help me . I'm looking for a room . 
 Person2:Yes . I've got a small room . 
 Person1:        How much is it ? 
 Person2:200 yuan a week , but smoking is not allowed . 
 Person1:        OK.Can I see the room now ? 
 Person2:Would you mind waiting ? I'm on the telephone . 

formal