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: If you think of anything else you need don't hesitate to contact us, we're always happy to help. Sentence2: Train TR5902 will suit your needs. May I book it for you? Sentence3: where are you going to? and what time would you like to travel? Sentence4: Yes please, I need to book it for 6 people. Sentence5: I have 3 entries available. 2 in the west and 1 in the centre. Do you have a price in mind? Two are expensive and one is cheap Sentence6: Yes, please for 6 people starting tuesday night. Sentence7: I'm looking for a 4 star hotel in the cheap price range, the place should have free parking. Sentence8: how many days will you be staying? Sentence9: I am going to Peterborough and it should arrive by 17:00 on Tuesday. Sentence10: I would prefer the cheaper one, please. What's it called? Sentence11: Yes they have both free wifi and parking. It's located at back lane, cambourne in the west. Would you like me to book you a room? Sentence12: The cambridge belfry is located on the west side and is super cheap. Sentence13: Booking was successful, the total fee is 99 GBP payable at the station . Reference number is : 9YJM47UH . Sentence14: No thanks. That is all I needed. Sentence15: Thank you I also need help with a hotel. I am looking for a 4 star hotel. What you got? Sentence16: Hi there. I would like to find a train leaving Cambridge. Sentence17: No problem. Their address is back lane, cambourne. Is there anything else I can do for you today? Sentence18: They sound like just what I need. Could you verify whether they have free parking, and give me their address? Sentence19: I'm sorry, I changed my mind. I don't need a room booked. I just need their address. Sentence20: The cambridge belfry is available, would you like to book there? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User