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:       Welcome to China , Mr . White . 
 Person2:How do you do , Ms . Chi ? 
 Person1:        Welcome to this corporation , Mr . White . Won ’ t you please sit down ? 
 Person2:Thank you . 
 Person1:        Our representative in your country faxed a letter that you showed an interest in some of our products on display at the Oct . Exhibition there . Now we'd like to know if you have any specific requirements in mind . 
 Person2:Yes , we have . I ’ Ve brought with me a list of the quantity of your products we ’ d like to import for the second half of this year . Here is a copy of it . 
 Person1:        Good . Well , Mr . White , most of the items listed are available this year . I hope we can come to an agreement and sign the contracts soon to enable timely delivery . 
 Person2:I hope so , too . Now I'd like some of your sales literature and a price list for all of your export articles . 
 Person1:        Here are our catalog and price list . The catalog lists all the commodities we export , and the price list gives indicative prices for all our export articles . 
 Person2:Thank you , Ms Chi . What are your normal export terms ? 
 Person1:        We normally export CFR . 
 Person2:What commission do you usually pay for your exports ? As you know , we import on commission basis . 
 Person1:        That can be discussed . 
 Person2:All right . When can we meet again for more specific details , Ms Chi ? 
 Person1:        What about tomorrow morning at 9 ? I'll come over to your hotel . 
 Person2:I'll be expecting you , then . 

formal