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:       I need some flowers for my girlfriend .  
 Person2:No problem . Would you like some artificial carnations ?  
 Person1:        Oh , no . Carnations are not very elegant.Artificial flowers have no passion .  
 Person2:How much did you want to spend ?  
 Person1:        Money is no object .  
 Person2:Our most elegant flower is Golden Lily .  
 Person1:        I will take ten .  
 Person2:Do you want to add some baby ’ s breath for that ? They are equally popular now .  
 Person1:        Of course . Can I have it delivered to my girlfriend's house this afternoon ?  
 Person2:Yes , but there is a five dollars delivery charge .  
 Person1:        That's ok . Here is the address . 

formal