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:       Do you rent cameras here ?  
 Person2:Of course . Which one do you like best ?  
 Person1:        I want one that is easy to handle .  
 Person2:Try this one . You can get a picture by simply pressing the shutter .  
 Person1:        That's good . What's the fee ? 

formal