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: That sounds great, could you make the reservations for me there then? I will be there Sunday with 3 people and we will stay for 2 nights. Sentence2: I am sorry the acorn doesn't have a room available then, how about another hotel? Sentence3: Booked! Reference number: 2BA346MA . Sentence4: Yes, I would prefer a moderate price range. Sentence5: I'm sorry. There is still no availibility. Would you like to try a different hotel then? Sentence6: Yes, please. Sentence7: I have several hotels in the north that offer free parking. Do you have a preferred price range so that I can narrow it down for you a bit? Sentence8: Yes, same price range. Sentence9: Okay great. Thank you very much. Sentence10: No,lets try ext weekend,see if you can book it for then ? Sentence11: I want to find a place to stay in the north with free parking. Sentence12: You're welcome. Is there anything else I can help you with today? Sentence13: No problem. Have a great day. Good-Bye. Sentence14: That will be all. Thank you for your help. Sentence15: The Acorn Guest House appears to meet your Criteria. Would you like more details on this hotel? Sentence16: Hamilton Lodge has the same amenities and is right next door. Would you like me to book that property for you? Question: Who has spoken the sentence 4? (A) User (B) System
Output: 


Answer: (A) User