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:       Hi . I'm looking for some good deals on produce .  
 Person2:You might want to try the mangoes .  
 Person1:        Can you describe a mango to me ?  
 Person2:It's a fruit a little smaller than a grapefruit . It has a big seed in it .  
 Person1:        Do I eat the seed ?  
 Person2:Maybe some animals eat the seed , but humans don't . You'd have to soak it for 10 years .  
 Person1:        What's the price of these mangoes ?  
 Person2:Today you get a 50 - percent discount . They're only $ 1 each .  
 Person1:        Tell me what they taste like .  
 Person2:Their flesh is soft and juicy . It has a citrus taste . It's sweet .  
 Person1:        Do I need to buy them ripe , or will they ripen at home ?  
 Person2:Just press into it gently with your thumb . If it feels soft , it's ready to eat .  
 Person1:        Where do mangoes come from ?  
 Person2:These are from Guatemala , but we're going to start getting mangoes from India . 

formal