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:       are you ready to go to the bank ?  
 Person2:sure , what do you need to do there ?  
 Person1:        there ’ s problem with my bank statement . There ’ s a mistake on it . I also need to withdraw some money form the ATM .  
 Person2:I have to exchange some money .  
 Person1:        that ’ s right . You ’ re going away next week .  
 Person2:I also want to see if my salary has been paid into my bank account . There was a problem last week .  
 Person1:        I have to pay my credit bill too . If I don ’ t pay it soon , the credit card company will charge me interest .  
 Person2:their interest rates are usually quite high . It ’ s a good idea to pay off your credit card debts before they attract interest . 

formal