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: May I have the reference number for my reservation please? Sentence2: Hi, I'd like a 3 star hotel please. And also internet! Sentence3: Sure, the address is Cambridge Retail Park Newmarket Road in Fen Ditton and the price range is moderate. Sentence4: Sorry, but I don't have any cheap 3-star places in town. Sentence5: I have some moderately priced guesthouses and some expensive hotels that meet your needs. Do you have a preference? Sentence6: 324XPFHG . is your reference number, anything else? Sentence7: I am also looking to eating Italian, in the East part of town. Sentence8: You're very welcome, enjoy your time in Cambridge! Sentence9: Perfect! Your booking was successful. Is there anything else that I can help you with? Sentence10: We have the pizza hut fen ditton, would you like me to make reservations? Sentence11: Thank you that's all I needed today. Sentence12: Okay, why don't we splurge a little. How about telling me what you've got that's expensive? Sentence13: Actually, I don't have a lot to spend. Do you have anything in a cheap price range? Sentence14: The Gonville Hotel in the centre and The Lensfield Hotel in the south are both 3 stars and expensive. Would you like to book one of them? Sentence15: Could I get the address and price range first? Sentence16: I'd like to book a room at the Gonville for 5 people. We'll arrive on Saturday and will stay for 4 nights, please. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System