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: Yes thanks, that will be all. Sentence2: There are 7 guesthouses available in the north that are moderately prices and four stars. Would you like to book one of these rooms? Sentence3: We have 11 places to stay in the north. Do you prefer a guesthouse or hotel? And do you need internet or parking? Sentence4: Can I have their phone number, please? Sentence5: I'd prefer a guesthouse. A 4 star one, if possible. Sentence6: Sure, it is 01223300552 Sentence7: Do any have both free parking and internet? If so, I'll need their phone number. Sentence8: I need a train going to Cambridge that'll leave after 12:15. Sentence9: what day of the week do you want to travel Sentence10: The limehouse meets your needs including internet and wifi, shall I book you or provide more info? Sentence11: The TR3257 leaves at 13:39 for 16.60 pounds. Would you like me to book that for you? Sentence12: The train is number TR3257. It arrives in cambridge at 15:07. How many tickets would you like? Sentence13: Yes. Also, what will be the arrival time? And, what is the train ID? Thanks so much! Sentence14: It was a pleasure to help today. Have a good afternoon. Bye. Sentence15: No, that is all I need. Thank you! Sentence16: i am, Also looking for a place to stay. The hotel should be in the north and should be in the moderate price range Sentence17: Thank you for using our services. Have we met all of your needs today? Sentence18: Trusday, I need to leave by the london liverpool street station. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System