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:       You're going to have coffee , aren't you ? 
 Person2:Yes . I could use a cup of coffee . 
 Person1:        Are you going to have anything to eat ? 
 Person2:French toast sounds good . What are you going to order ? 
 Person1:        I'll have that too . 

formal