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: Christ's College looks good, it's in the city centre and has a free entrance fee. Sentence2: Yes, I also need a train leaving on Monday. Sentence3: Can you tell me where you will be departing from and heading to, please? Sentence4: Can you give me their phone number and postcode? Sentence5: Thank you, that will be all. Sentence6: Do you have a college to recommend instead? Sentence7: No, thank you. That will be all. Thanks! Sentence8: I would recommend the train that leaves at 13:54. Would you like me to book that? Sentence9: Does that train arrive by 17:00? Sentence10: Thank you and goodbye Sentence11: I will be leaving from Stevenage and heading for Cambridge. Sentence12: It is 12.80 pounds. Sentence13: Is there a time you would like to leave by or arrive by? Sentence14: Yes, it arrives at 14:43 Sentence15: What is the price of this particular train? Sentence16: I'm looking for a place to go in the centre. Sentence17: Alright, just to confirm you do not need me to book you for the train? Sentence18: How about All Saints Church? Sentence19: Sure! The phone number is 01223334900 and the postcode is cb23bu. Is there anything else I can help you with today? Sentence20: From stevenage to cambridge please Question: Who has spoken the sentence 19? (A) User (B) System
Output: 


Answer: (B) System