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: Thanks. Yes, please reserve a taxi for me from the Alexander B & B to the restaurant. I need to leave the hotel by 3:45 at the very latest. Sentence2: No, that's everything. Thank you for your assistance! Sentence3: A booking for 3 people for 2 days is unsuccessful. Would you like to try anything else? Sentence4: There phone number is 01223361763. university arms hotel is an expensive 4 star hotel. May I book it for you? Sentence5: There are currently no available restaurants with scottish food in the centre. Would you me to look in another area? Sentence6: Yes please try for 2 nights instead. Sentence7: Yes I have many options. What price range would you most prefer? Sentence8: Oh, no, I really need the hotel to be cheap. Sentence9: How about the Charlie Chan? They are a budget-friendly Chinese restaurant in the centre of town. Sentence10: Hi, i'm looking for a local establishment that serves scottish cuisine. Could you recommend somewhere near the centre? Sentence11: Booking was successful. Reference number is : ATBUIFXS . Is there anything else I can help you with? Sentence12: The alexander bed and breakfast is the only cheap 4 star place in the centre of town. Will a guesthouse instead of a hotel work for you? Sentence13: The booking should be for 5 people and 2 nights. Can you please try again? Sentence14: That sounds good. May I have their telephone number? Also could you help me finding a 4 star hotel in the same area? Sentence15: No, let's stay in the centre. Are there any Chinese places there? Sentence16: Sure. Look out for a white Volvo. The contact number will be 07936735628. Anything else? Sentence17: Yes could you reserve that for me for 2 nights from Thursday for 3 people. I will need a reference number as well. Sentence18: Thank you. Goodbye. Sentence19: Any price range is fine. Sentence20: I'm sorry, but booking was unsuccessful for three days. Would you like to try two? Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User