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:       Hello , and welcome to IBA . Which service do you require ?  
 Person2:Hello , Shelly , is it ? I'm here on behalf of my company , so I'll need the Corporate Banking Services .  
 Person1:        That's no problem ; I can take care of that for you .  
 Person2:I need to have a credit check done for my company .  
 Person1:        If it's this kind of consultancy service , I'll have to direct you to another department , I'm afraid .  
 Person2:That's no problem . Do you offer any other consulting services ?  
 Person1:        There are many services you can choose from . Why don't you take a look at this leaflet while I find someone who can help you ?  
 Person2:Great . I'll wait right here , thanks . 

formal