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 thank you that will be all Sentence2: How about acorn guest house? Sentence3: Ok great, is there anything else I can help you with today? Sentence4: I'm sorry. I'm not finding any concert halls in the east. Would you like to try a different area or attraction type? Sentence5: What is the postcode to that place? Sentence6: You're welcome, Have a great day! Sentence7: Just pick one. Sentence8: And where would you like this guesthouse to be? Sentence9: North part of town and moderate price with wifi Sentence10: No, please get me their address and phone number. Sentence11: They are on 154 chesterton road, postal is cb41da, phone number is 01223353888, can I help with anything else? Sentence12: I was wondering whether there are any concerthalls in the east that I could check out. Sentence13: The postcode for Cambridge artworks is cb13ef. Anything else I can do for you? Sentence14: Okay! How about Cambridge Artworks? Admission is free! Sentence15: I am planning my trip and would like to find a guesthouse to stay at. Sentence16: How about a museum? Sentence17: we have museums in the east quite a few actually how can I help you? Sentence18: Do they have free parking? Sentence19: Yes they do have free parking. Do you need me to book you a room? Sentence20: Sure, I can try that. Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User