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 have none listed like that,a different price range maybe? Sentence2: Booking was successful.Reference number is : AENEDXFY Sentence3: There are two options here. Would you prefer the south or the centre? Sentence4: sorry about that! why yes, there are 10 options for inexpensive hotels. Sentence5: Sounds good. 1 person, 4 nights and leaving from Wednesday. Sentence6: You are set, ref number is CPD3XEJI is there anything else I can help you with? Sentence7: What date and time for your reservation? Sentence8: Can you try the other restaurant? Sentence9: I am in the process of completing your reservation and nandos city centre. What day will you be dining? Sentence10: Thank you for using our service, and enjoy your time in Cambridge! Sentence11: Would you like me to make you a reservation at nandos city centre? Sentence12: Sure. Just give me the reference number once you do it Sentence13: No I think I bugged you enough! You have been great and fast too! Sentence14: I would suggest autumn house Sentence15: How many people for the restaurant? Sentence16: Make the reservation for wednesday and then give me the reference number Sentence17: Nandos is located both in the south and in the centre. Would you like me to make a reservation for you? Sentence18: The reservation should be at 13:00 Sentence19: I also need a restaurant, preferably one that serves portuguese food and is the same price point as my hotel. Sentence20: I would like to have a 4 star rating with free parking. Sentence21: I don't mind. Surprise me! Sentence22: I'm currently planning a visit to Cambridge and looking for a cheap place to stay. I don't need internet or any frills. Any good suggestions? Sentence23: There will be just me. Sentence24: Yes, that would be fantastic. Thank you very much. Sentence25: I am unable to book it right now. Sentence26: So, you are saying there are no cheap hotels in all of Cambridge? Can you maybe look one more time? Thanks! Question: Who has spoken the sentence 21? (A) User (B) System
Output: 


Answer: (B) System