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:       Could we borrow the company van for a fundraiser this weekend ?  
 Person2:That would be a possibility . Where is this fundraiser taking place ?  
 Person1:        It is in the hotel ballroom down the street .  
 Person2:Do you need it for the whole weekend ?  
 Person1:        We will need it for both days .  
 Person2:We will need to know who will be driving the van .  
 Person1:        The van will be driven by Mary and me .  
 Person2:It needs to be back on Sunday night . Can you arrange for that ?  
 Person1:        Oh yeah , no problem . Would you mind if we borrowed a few of the chairs from the lunchroom .  
 Person2:Just keep track of everything and get it all back where you took it from by Sunday evening . 

formal