Detailed Instructions: 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'.
Q:  Person1:       Do you feel like going to see Paul and Claire tonight ?  
 Person2:I'd like that very much .  
 Person1:        How does 7:30 sound ?  
 Person2:Fine . See you later . 
A:
informal