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: What is the price range of the Alexander Bed and Breakfast? Sentence2: How about guesthouses? Or would you prefer a hotel? How long is your stay and how many rooms? Sentence3: I have no expensive guesthouses, but I do have the University Arms Hotel that is expensive in the centre of town, rated 4 stars with wifi and parking. Sentence4: Sure, their phone number is 01223351241 and the postcode is cb21ad. Can I assist you with anything else? Sentence5: Ok, I've booked 5 people on TR 3293. Your reference number is BBG39TVV and your total due is 88 GBP payable at the station. Anything else I can do? Sentence6: We will need the guesthouse for 4 nights starting friday and will need 2 rooms. Thank you. Sentence7: That would be perfect. Can you book that for 5 people and give me a reference number? Sentence8: I am looking for a train departing out of Norwich to Cambridge, please. Sentence9: No, actually I need a hotel in the expensive price range. Sentence10: You're welcome. Have a great day! Goodbye. Sentence11: That should be all, thank you. Sentence12: TR3293 will leave at 08:16 would that work for you? Sentence13: I need a place to stay too. Sentence14: Alexander Bed and Breakfast in the centre is an excellent choice. Would you like to make reservations? Sentence15: Could I get the postcode and phone number? Sentence16: I'd like to leave on friday after 08:15 Sentence17: Certainly. What day and time would you like to travel on? Sentence18: The price range on the Alexander Bed and Breakfast is cheap. Would you like to book a room? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User