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:       Good morning , Miss Wu ! Can I ask you something ?  
 Person2:Certainly . You are more welcome to do . What is it ?  
 Person1:        Tomorrow is my wife's birthday . We both love spicy Chinese dishes . I am wondering if you could recommend a good local restaurant where I can find some good spicy dishes .  
 Person2:Well , if spicy local dishes are what you are looking for , In Hua Restaurant is the best place to go . The restaurant serves very good and spicy local dishes . You might want to try there .  
 Person1:        How far is it from here ?  
 Person2:It is near the university . Five minutes ' walk from your flat , I think .  
 Person1:        Great . We'll go and have a try . Thank you very much .  
 Person2:You're welcome . May you have a good time . Please give my regards to your wife . I wish her a happy birthday tomorrow .  
 Person1:        Thank you . The same to you . 

informal