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: You are booked for the Pizza Express. Your reference number is G6O0PMU6 . Sentence2: Good day. I'm headed into town and I need help finding a guesthouse that offers free wifi please Sentence3: thank you that will be all Sentence4: Okay, i'll try it out! Book me for 6 people, 2 nights starting this monday. Sentence5: I would refer in the center and as long as it's moderate pricing. Sentence6: There are two pizza express locations in the centre. One in Regent Street City Centre and the other in Jesus Lane Fen Ditton. Would one of those work for you? Sentence7: The area doesn't matter, but I would like it to be in the moderate price range. Sentence8: Have a good visit! Sentence9: Your booking was successful! Your reference number is M2YEYUTC . Is there anything else I can help with? Sentence10: Four great options in the north and one in the east, I suggest the Acorn. Sentence11: there are 5. which side of town do you prefer? Sentence12: Yes, let's go for the one in Regent Street City Centre. It will be on Monday, at 19:15, and there will be 6 people. Sentence13: Okay, I can help with that. What is your price range and what area would you like to stay in? Sentence14: Thank you. Yes, I also need to find a moderately priced Italian restaurant. Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System