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:       We've got very good workshop facilities here . We do all our own servicing and most repairs . We have separate areas for welding , grinding and sawing .  
 Person2:Is there anything you don't do in-house ?  
 Person1:        Yes . If we don't have the facilities to deal with it here , we send it out for maintenance .  
 Person2:Is that more expensive ?  
 Person1:        It depends on the job . It's actually more cost-effective than buying specialist equipment that we don't use very often . 

formal