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: i am leaving for cambridge and it should arrive there by 20.45 Sentence2: I just need it for one night for one person please. Can you tell me which area it is in? Sentence3: Thank you I also need a place to stay that is a guesthouse with free parking. Sentence4: That works. What's the phone number, area, and if they have internet? Sentence5: It is in the south area. Sentence6: aylesbray lodge guest house is in the south of town, their phone number is 01223240089 and they have internet Sentence7: I have 19 trains available. Could you narrow it down to a specific destination and departure time please. Sentence8: Thank you very much, I think that's all I needed. Sentence9: I'd be happy to. When would you like to begin your stay, and for how many nights would you like rooms reserved? Sentence10: I have several results matching your request. What price range and area of town would you prefer? Sentence11: I don't have a preference for area, I would just like it to have 4 stars and a moderate cost with free parking. Sentence12: Are there any trains leaving from Stansted Airport on Thursday? Sentence13: There are 9 options for a guesthouse with your requested price and amenities. The Aylesbray Lodge Guest House is lovely this time of year, if you're interested? Sentence14: Could you book it for me? Sentence15: The train that arrives the closest to your preferred time is TR2286 which arrives at 19:52. Does that work for you? Sentence16: You are welcome. Have a good day! Sentence17: I would like to make a booking for TR2286 for 1 person. Sentence18: Ok, I've booked you 1 ticket on TR2286. The fee of 10.10 GBP is payable at the station. Your reference code is QHKC3MOF . Anything else I can do? Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System