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: Hobsons house is a guesthouse and the postcode is cb39lh. It is in the moderate price range. Would you like to book a room? Sentence2: I need a train from broxbourne Sentence3: Do you have time travel preference? Sentence4: Booking was successful for TR5979, the total fee is 143.19 GBP payable at the station. Your reference number is : CNUS8VFV . Can I help you with anything else? Sentence5: I'm looking for a hotel with free wifi. It doesn't need to have free parking. Sentence6: Yes, please book this for 8 people. I will also need the reference number. Sentence7: Certainly, the postcode for gonville hotel is cb11ly. the price range for the hotel is expensive, but I don't have the actual price. Sentence8: Okay then, you have a wonderful day! Sentence9: Thank you. That's all I need for now. Sentence10: No thank you. I just need the price and the postcode please. Sentence11: Is that a hotel. If so, could you get me the postcode and price range please. Sentence12: I need to leave on Thursday. Sentence13: My apologies about the confusion, it looks like the best option for you is the TR5979, which leaves at 10:32 and arrives at 11:32. Shall I book this for you? Sentence14: No, I'll book one when I get there. Thank you for your help! Sentence15: I'm happy to have been of service. Is there anything else I can help you with today? Sentence16: Yes, time travel would be fine. But I need to get to Cambridge by 11:45 at the latest. Sentence17: Will a guesthouse do, or are you only interested in a hotel? Sentence18: No that is all I needed. Sentence19: What day would you like to travel to Broxbourne? Sentence20: Just a hotel, and it needs a three star raiting. Sentence21: I've got the gonville hotel with a 3 star rating. Would you like me to make a booking for you? Sentence22: hobsons house looks good, it's got a 3 star rating and wifi. would you like me to book it? Question: Who has spoken the sentence 20? (A) User (B) System
Output: 


Answer: (A) User