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: Hakka and The Hotpot are both expensive Chinese restaurants on the north side of town. Would you like a table at one of these? Sentence2: You're welcome! Thanks for using our services. Sentence3: Yes please book the train for 23:29. Sentence4: Unfortunately, I'm not seeing any Vietnamese restaurants in the north. Would you like to try a different area or type of cuisine? Sentence5: There are 2 trains that fit this request. One at 21:29 and another at 23:29. Did you want me to book one of them for you? Sentence6: I am looking for a Saturday train departure from Cambridge Sentence7: That'll be everything. Thank you! Sentence8: How many tickets do you need? Sentence9: How about a Chinese restaurant. Ideally expensive. Sentence10: No, but I need to find a restaurant. It should serve vietnamese food and it should be in the north. Sentence11: I don't need a booking, but can you tell me the train ID, travel time, and arrival time of that train? Sentence12: I've booked that for you. The reference number is ZAV4B1D8 . What else can I help you with? Sentence13: What destination would you like me to look for? Sentence14: I'm hoping for a train to bishops stortford after 21:15. Sentence15: I'd like to reserve a table for 3 at The Hotpot for 10:00 Saturday. I'll need a reference number as well. Sentence16: TR0123 is the train ID. It leaves at 23:29 and arrives at 24:07. Did you need any more information about the train? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User