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: No thank you. I just needed the address. Thanks for your help. Sentence2: I am not picky about the area. I prefer the moderate price range and a 4-star rating, please. Sentence3: I want to board a train on Thursday. Can you help me with that? Sentence4: You are welcome enjoy. Sentence5: I have booked your seats here is the information:Booking was successful, the total fee is 141.6 GBP payable at the station . Reference number is : PY3UDDOV . Sentence6: Which area would you prefer north, south, or east? Sentence7: Yes of course! Where are you traveling to? Sentence8: Yes please book the acorn guest house. Also could you give me the address for the hotel. Sentence9: Absolutely. There are 21 guesthouses that have free parking, could you tell me which area you would like to stay in? Sentence10: Yes it's possible. We have 2 trains departing at 05:17 and at 7:17. Which one would you prefer? Sentence11: I have ten trains doing that trip on Thursday. Any specific times? Sentence12: I am travelling to Cambridge and it should depart from London Kings Cross. Sentence13: Please make a booking for 6 people on the 7:17 train. Sentence14: Great, thank you! I'm also looking for a guesthouse that includes free parking. Can you help out? Sentence15: How about the acorn guest house, its moderately priced located in the north? Sentence16: I need to arrive by 09:00 if that is possible. Sentence17: I really don't care about the area, can you just suggest one for me? Sentence18: 154 chesterton road. Would you like a reservation? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System