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:       Welcome to Lincoln Bank . Which service do you require today ?  
 Person2:I'm here to ask about a loan .  
 Person1:        We have many loans on offer . May I ask what the purpose of the loan is ?  
 Person2:I got married not long ago and we are expecting our first child . I'd like to buy a car for the family .  
 Person1:        I see . What you need is one of our Petty Consumer Loans .  
 Person2:Could you tell me what the requirements are for that , please ?  
 Person1:        Certainly . It's quite simple really . Do you hold a resident's permit ?  
 Person2:Yes , I do . I was born and bred here .  
 Person1:        That's great . We'll also need details of your occupation .  
 Person2:I have all of that with me . I've also banked here for a number of years . 

formal