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:       How do I apply to an American university ?  
 Person2:You should go to the library to find some information about American universities , and write to the Admission Office . Then the Admission Office will send you application forms and other related materials . From experience , many applicants write to several universities instead of just one .  
 Person1:        I was told that it took a lot of time and effort to apply .  
 Person2:That is true . I ’ ll list for you the requirements of almost all the universities . First of all , you need official transcripts of your undergraduate work , three letters of recommendation from your professors who know your competence , and the official TOEFL ( Test of English as a Foreign Language ) score ( It ’ s usually 550 ) . Then you need a financial guarantee , and an application fee of 25 dollars .  
 Person1:        What's to come next ?  
 Person2:If they agree to enroll you , they will send you a TAP - 66 Form . With TAP - 66 , you can apply for a passport from our government , and then apply for a visa from the US . Embassy in Beijing .  
 Person1:        How long will it take to go over all the procedures ?  
 Person2:From 3 to 6 months if everything goes well .  
 Person1:        Thank you . I appreciate your help .  
 Person2:You are welcome . Please feel free to ask if you have any more questions . 

informal