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:       What can I do for you ?  
 Person2:Hello , there . I've just started using your net banking and I'm looking for some information about my Commission Fund .  
 Person1:        I see . The Fund Trading System of our Net Banking deals with both trading and information . If you use this system , you can subscribe for and apply to buy other funds . You can also get lots of other useful information .  
 Person2:Regarding what exactly ?  
 Person1:        Fund info , the fund code , fund net value per unit , fund public info , fund account balance , fund trading conformation , daily details and the history . With our Net Banking , anything is possible ! 

formal