You will be given a definition of a task first, then some input of the task.
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'.

 Person1:       Oh great ! This stupid computer froze again ! That's the third time today ! Hey Samuel , can you come take a look at my PC ? It's acting again . It must have a virus or something .  
 Person2:Just give me a second . I'll be right up . I ran a virus scan on your computer , and it turns out that you have a lot of infected files !  
 Person1:        But I'm quite careful when I'm browsing theinternet , I have no idea how I could have picked up a virus .  
 Person2:Well , you have to make sure that your anti-virus software is updated regularly , yours wasn't up to date , that ’ s probably what was causing your problems .  
 Person1:        Ok . Anything else ?  
 Person2:Yeah , try not to kick or hit the computer !  
 Person1:        Um yeah . Sorry about that . 
Output:
informal