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: Nope, that's all for me. Thanks for your help. Goodbye! Sentence2: I have successfully booked that for you. Your reference number is 6NUU0T68 . Is there anything else I can help you with today? Sentence3: Yes, please. In the same price range, if possible. Sentence4: I am looking for a hotel that include free parking and has a 1 star rating. Sentence5: I'm sorry, there are no hotels or guest houses matching that criteria. Sentence6: How many people are you wanting to book the hotel for? Sentence7: There are no cottages. Sentence8: Could find one in a moderate or cheap price range? Sentence9: Yes can you find guesthouses meeting that criteria? Sentence10: for 8 people. Starting from Sunday for 4 nights, please. Sentence11: Could you please try guesthouse, with free parking and a 4 star then? Sentence12: Sure, there are a few. Can I book you a room at one of them? How about The Acorn Guest House? Sentence13: I have the arbury lodge guesthouse in the same area and price range,would you like me to book that one? Sentence14: Yes go ahead and try that please. Sentence15: You're welcome, have a great day! Sentence16: Can you locate a cottage that offers what i am looking for. Sentence17: There are no hotels that meet that criteria. Would you like me to expand the search a bit? Sentence18: I have 16 entries matching that criteria. What part of town and price range would you prefer? Sentence19: Yes please try to book that for me thank you. Sentence20: The booking for the Acorn Guest House was unsuccessful. Would you like me to look for another hotel for you? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User