TASK 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'.
PROBLEM: Person1: Do you like a package tour or to travel alone ?
Person2:I prefer a package tour , and we don't have to worry about accommodation , meals or that sort of trivial demanding things .
Person1: I prefer travel alone . I'll have a lot of time lingering at one place .

SOLUTION: formal

PROBLEM: Person1: Are you almost finished with my hair ?
Person2:I'm almost finished .
Person1: How much longer is it going to be ?
Person2:I'm done now . Do you like it ?
Person1: I absolutely love it .
Person2:You really like it ?
Person1: Yes , I truly do .
Person2:I'm glad you like it .
Person1: How much do I owe you ?
Person2:It's going to be $ 55 .
Person1: Here you go , thanks for everything .
Person2:Make sure and come back in a couple of weeks .

SOLUTION: informal

PROBLEM: Person1: I love Chinese food .
Person2:What's your favorite dish or dishes ?
Person1: Well , I always order fried spring rolls when I go to Chinatown .
Person2:But a Chinese person would never order that .
Person1: Really ? But they're delicious !
Person2:Alex , you don't know what to order . Let's go to a Chinese restaurant together next time .
Person1: That sounds great .
Person2:Get ready for the best meal of your life !

SOLUTION:
informal