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:       Hey Jackie . What are you doing ?  
 Person2:Nothing much . I'm just relaxing today . Why ? What's going on ?  
 Person1:        I was thinking about heading to the mall . Do you want to go ?  
 Person2:Are they having a sale ?  
 Person1:        Yeah . Both Bon and Nordstrom's is having there annual sale . It's a great time to buy some clothes you've been holding out on .  
 Person2:That sounds great . Where should we meet ?  
 Person1:        I'll meet you in front of Nordstrom's in 30 minutes .  
 Person2:Sounds good . See you there .  
 Person1:        What do you think about these shoes ?  
 Person2:They're cute . But do you think you'll wear them much ?  
 Person1:        No . Not really .  
 Person2:This sweater is so pretty . I love the low neck design .  
 Person1:        I bet it's expensive .  
 Person2:It's on sale for $ 80 . What do you think ? Should I try it on ?  
 Person1:        For 80 bucks it looks great . Go try it on . 

informal