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: Okay. I don't care if it is a hotel or guest house, but it needs to be expensive, 4 stars, and in the centre. Sentence2: I would like moderate pricing and 4 stars please Sentence3: I am still having issues finding a hotel for you, would you please restate your criteria one more time? Sentence4: Its been such a pleasure talking to someone as polite and eloquent as you, enjoy your day. Sentence5: There are 11. What kind of museum would you like to visit? Sentence6: I want some entertainment in the centre. What do you have? Sentence7: No need to book it, just give me the address please Sentence8: I'm sorry, there is not anything in the centre. There are some venues in all of the other areas though. Do you have a second preference? Sentence9: Could you just pick one for me? Sentence10: How about castle galleries? Sentence11: Sounds interesting. What is their address with postcode? Is it free? Sentence12: The address for the University Arms Hotel is Regent Street. Sentence13: Okay thank you I won't be needing any more from you today. Goodbye Sentence14: Type does not matter. Please try the search again without type specified Sentence15: I found the University Arms Hotel, would you like me to book it for you? Sentence16: Sorry, no places matching that query. Would you like to change your area, type, star rating, or price range? Sentence17: Is that 4 stars and in the moderate price range? Sentence18: I need a place to stay. Can you suggest a hotel in the centre of town? Sentence19: Of course, there are three hotels in the centre. Do you have any particular needs? Sentence20: It is 4 stars in the expensive price range. They also have parking and wifi. Would you like me to book this? Sentence21: Are there any musems in centre? Sentence22: It is free! The address is unit su43, grande arcade, saint andrews street cb23bj Do you need anything else? Question: Who has spoken the sentence 21? (A) User (B) System
Output: 


Answer: (B) System