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 traveling between the two places. I need to leave the restaurant by 23:15. Sentence2: All saints church is architectural and located in the centre of town. Sentence3: Charlie Chan is a cheap chinese restaurant in the centre of town. Would you like more information or to book a table? Sentence4: You're all set! Your car will be a red tesla and their contact number is 07799680227 should you need to contact them! Sentence5: Nah, that's not necessary. I just need the postcode, please. Sentence6: Thank you for all your help! That will be all for today! Sentence7: I've just double checked. Cambridge doesn't have any Polynesian restaurants at all. Can I look for something else for you? Sentence8: I also want a moderately priced Polynesian restaurant. Sentence9: Sure. The All Saints Church is located at jesus lane. Sentence10: I was hoping you can help me find a place to go that has to do with architecture. Sentence11: How about chinese food? Sentence12: You're welcome, have a great day! Sentence13: That would be fine. Can I get the address please? Sentence14: Certainly! What are your departure and arrival destinations and when would you like to leave or arrive by? Sentence15: Could you check again? Sentence16: I also need a taxi. Sentence17: The post code is CB21DB for Charlie Chan's. May I assist you any further? Sentence18: I am sorry but there are no moderately priced Polynesian restaurants. Would you like a different type of food or price range? Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System