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: Yes, there are multiple places to stay in Cambridge. May I help narrow down these choices for you? Sentence2: I need a place to stay with free wifi. Sentence3: Booking was successful. The table will be reserved for 15 minutes. Reference number is : UF08L0ON . Anything else that I may help you with. Sentence4: I'd suggest bridge guest house on 151 hills road. Would you like a reservation? Sentence5: Can you make a reservation for 8 people for 5 nights starting from Wednesday? Sentence6: Actually, I'm also looking for an expensive place to dine in the centre. Sentence7: I don't care about what part of town it is in, but I would like a 3 star guesthouse. Sentence8: Thank you for using our services. Sentence9: The Bridge Guest House is in the moderate price range, and we have attractions in all areas of Cambridge so I'm sure you will find something to your liking. Sentence10: No, you've been very helpful. That's all I needed. Thank you very much. Sentence11: Yeah, I'd like a taxi to take me from my hotel to the restaurant in time for my reservation. Please tell me the car type and contact number. Sentence12: yes, that's everything for me. Thanks for helping, goodbye Sentence13: The Kymmoy is expensive and in the centre of town Sentence14: Taxi is booked. It's a black volkswagen, phone number 07609143114. Is that all for now? Sentence15: How expensive is it ? And is there any nearby attractions ? Sentence16: I was able to book the room for you your reference number is 5YY25K1O . Is there anything else you need me to do for you? Sentence17: I need to book a table for the same group of people at 20:00 the same day. I need the reference number as well. Sentence18: You are welcome. Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System