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:       Hey Steve . When's the next time you're going to play golf ?  
 Person2:I'm going out this Saturday .  
 Person1:        Do you already have a foursome ?  
 Person2:Unfortunately , we do . Let's plan for something together for Wednesday . We can go right after work .  
 Person1:        That sounds good . Where do you want to play ?  
 Person2:We won't have much time , so let's play somewhere close to work .  
 Person1:        How about Bellevue ? It's pretty close .  
 Person2:How much does it cost over there ?  
 Person1:        Twilight rates are 21 dollars .  
 Person2:That's pretty good . Let's do it .  
 Person1:        Aright . I'll get a tee time for Wednesday at about 4  
 Person2:Make it 4  
 Person1:        Ok . I'll call you later when I get a tee time .  
 Person2:Sounds good . I'll see you on Wednesday then .  
 Person1:        Aright . Have fun on Saturday .  
 Person2:Will do . 

informal