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:       IBA Bank , Business Banking Department . Ling Ming speaking . How may I help you ?  
 Person2:Ms Ling ! It's Mr Gwent , from Montgomery Computers .  
 Person1:        Hello , Mr Gwent . What can I do for you today ?  
 Person2:Some money has been sent from our Head Office in Berlin . Could you check whether you have received the remittance yet ?  
 Person1:        Of course . Do you know which bank it was sent through and the amount and currency ?  
 Person2:Deutsche Bank . It was 25,000 US dollars .  
 Person1:        Yes , here it is . That's received and cleared , so it's available for withdrawal . 

formal