Definition: You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.

Positive Example 1 -
Input: Sentence1:i need a place to dine in the center thats expensive Sentence2: I have several options for you; do you prefer African, Asian, or British food? Sentence3: Any sort of food would be fine, as long as it is a bit expensive. Could I get the phone number for your recommendation?Question: Who has spoken the sentence 2? (A) User (B) System
Output: Answer: (A) User

Positive Example 2 -
Input: Sentence1: Guten Tag, I am staying overnight in Cambridge and need a place to sleep. I need free parking and internet. Sentence2: I have 4 different options for you. I have two cheaper guesthouses and two expensive hotels. Do you have a preference? Sentence3: No, but I'd really like to be on the south end of the city. Do any of those fit the bill? Sentence4: Sure. Does price matter? We can narrow it down and find exactly what you need. Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (B) System

Negative Example 1 -
Input: Sentence1: I am looking for a hotel named alyesbray lodge guest house. Sentence2: i have their info, what would you like to know? Sentence3: I would like to book a reservation for it. Can you help me with that? Sentence4: I sure can. First, I will need to know when you want your stay to begin and how many days you'll be staying. Also, how many people will be staying? Question: Who has spoken the sentence 1? (A) User (B) System
Output: Answer: (A) User

Negative Example 2 -
Input: Sentence1: Hi there! Can you give me some info on Cityroomz?. Sentence2: Cityroomz is located at Sleeperz Hotel, Station Road in the Centre area. It is a moderatley priced hotel with a 0 star rating. Would you like to book a room? Sentence3: Yes please. I need it for 7 people for 3 nights starting on tuesday. Sentence4: How many days would you like to book it for? Question: Who has spoken the sentence 4? (A) User (B) System
Output: Answer: (A) User

Now complete the following example -
Input: Sentence1: Does the hotel offer free wifi? Sentence2: That is all I need today. Thank you. Sentence3: Would you be able to book the stay for four nights instead? Can i also get the reference number? Sentence4: Sadly I was unable to book you for that time period. Is there another day you'd like to check in, or possibly you could stay for a shorter time period? Sentence5: Sure thing there are 70 trains making that trip, what day and time would you like to go? Sentence6: You're welcome. Good-bye. Sentence7: Great, I think that will work. I need a room for myself for five days, starting Wed. Sentence8: No, as long as it arrives by 10:15. Sentence9: That will be great. I am also looking for a place to stay in the south part of town. Do you have any recommendations? Sentence10: There are 3 trains available. Do you have a preferred departure time? Sentence11: TR8813 departs london liverpool street at 7:39 and arrives in cambridge at 9:07. I can book tickets for you, if you like. Sentence12: Certainly, we have 3 guesthouse aylesbray lodge guest house, bridge guest house, rosa's bed and breakfast or the lensfield hotel. Which would you like? Sentence13: Yes, Rosa's does offer free wifi. Sentence14: Booking was successful for 4 nights at rosa's bed and breakfast . Your reference number is : 1G56HJK3 . Can I help you with anything else? Sentence15: Good day, I need help getting a train from London Liverpool street going all the way to Cambridge, can you help me? Sentence16: I need something in the cheap price range. Sentence17: Rosa's Bed and Breakfast fits that, would you like to book a room there? Sentence18: I would like to travel on Wednesday and arrive by 10:15. Can you help? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System