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:       Hi , Mary . I haven't seen you in ages ! I heard that you and Daniel are getting married on August 8th , the opening day of the 2008 Olympic Games . Is it true ?  
 Person2:yes , it is . We've been dating for over 7 years . We have decided to get married on a special day and we think August 8th , 2008 is a red-letter day .  
 Person1:        good for you ! It sounds like you've done a lot of planning in a very short time .  
 Person2:yes , there is a lot of to be taken care of---wedding photos , wedding dress , catering , transport , hotel , etc ...  
 Person1:        is everything ready now ?  
 Person2:almost . The only thing that isn't ready is the hotel . As a lot of people have chosen that day to get married , it is hard to find a hotel that isn't too expensive .  
 Person1:        have you tried The Peninsula Palace Beijing ? My wedding reception was held there and they did an excellent job .  
 Person2:yes , we called , but it is booked up . The only choice is the Regent Beijing but we haven't made up our minds yet .  
 Person1:        it's an excellent hotel . A friend of mine had her wedding reception there and said it was perfect , though very expensive .  
 Person2:that's why we want to have a look at other hotels . We don ’ t want to spend too much on an extravagant wedding reception .  
 Person1:        I guess you're right . I can help you ask other hotels . I am sure there are probably some available .  
 Person2:thank you .  
 Person1:        my pleasure . 

informal