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:       Car trouble center . How may I help you ?  
 Person2:My car won ’ t start ! Stupid old car !  
 Person1:        Hold on , before you kick your car let ’ s go through some possible problems .  
 Person2:Fine .  
 Person1:        OK , first of all , can you turn the key in the ignition ?  
 Person2:Yeah ! I am here with my friend and he thinks it may be the spark plug or the starter motor .  
 Person1:        Those are possible problems , but tell me , when you turn the key , do you hear the starter motor crank ?  
 Person2:Yeah , it sounds like it usually does when I start the car , but nothing else happens . The engine won ’ t start . Should I maybe press the accelerator ?  
 Person1:        No . If you step on the accelerator pedal you can flood the carburetor and your car will never start .  
 Person2:So what do you think it is ?  
 Person1:        I know this may seem like a silly question , but does your car have gasoline ?  
 Person2:Umm . yeah ! Right ! I got the car started ! Thanks for your help ! I told you to fill the tank ! 

informal