Given the task definition and input, reply with output. 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'.

 Person1:       Do you have wool socks ? 
 Person2:Yes . We have socks made of various materials . These socks are of imported wool . 
 Person1:        Can you guarantee the quality ? 
 Person2:Yes , absolutely . 
 Person1:        Where are the panty-hose ? 
 Person2:Here . We have black , white and transparent panty-hose here .

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
formal