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:       This is where we sing ? These booths are so comfortable , I think I could fall asleep !  
 Person2:Let's order something to eat . What are you in the mood for ?  
 Person1:        I'll have whatever you're having .  
 Person2:OK . How about some fried spring rolls and squid balls , some pork skins , and some beer !  
 Person1:        Well ... the beer sounds good ! 

informal