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:       Julia , are you free tonight ?  
 Person2:What's up ?  
 Person1:        I want to invite you to go to the movies .  
 Person2:Are you asking me for a date ?  
 Person1:        Yes .  
 Person2:I don ’ t like to go to the movies on a date . It's noisy there .  
 Person1:        Where do you want to meet ?  
 Person2:Let's go to the coffee shop then . It's quiet there .  
 Person1:        What time should we meet ?  
 Person2:How about seven ?  
 Person1:        All right . 

informal