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: No thanks, that's all I needed. Have a good day. Sentence2: A 4 star rating please. Sentence3: I have booked a white volvo for you with Contact number: 07201581539. Can I help with anything else today? Sentence4: Ok! Whale of a time is located at Unit 8 Viking Way Bar Hill on the west side of town. Phone is 01954781018. Sentence5: How about the avalon it's a 4 star moderately priced hotel in the north. Sentence6: Great, thanks! Do I have any other entertainment options? Sentence7: I'm afraid there is nothing along those lines available. Can I change your search criteria a bit? Sentence8: Perfect. I need 5 nights for 6 people starting on Wednesday. Could I have the reference number after booking? Sentence9: Hi, I'm looking for some kind of entertainment in Cambridge? Sentence10: I would like the moderate price range. Sentence11: The whale of time sounds great. I also need a place to stay that has free internet and in the west. Sentence12: Thank you for contacting us and have a nice day. Sentence13: There are 3 options, any preference on pricing? Sentence14: Okay, I have 4 options available. Is there a price range or star rating you'd prefer? Sentence15: Can you try looking in the north? Sentence16: Yes, there is everything from parks to nightclubs. Several colleges and museums. Holy Trinity Church is a great architectural attraction. Sentence17: Booking was successful. Reference number is : BVCGE59G . anything else? Sentence18: Yes, I'll need a taxi to get to the hotel from whale of a time. I need it to leave by 06:00 Question: Who has spoken the sentence 14? (A) User (B) System
Output: 


Answer: (A) User