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: Churchill college is a college in the west. The phone number is 01223336233. The postcode is cb30ds. Can I help with anything else? Sentence2: Well what about helping me find something to visit in Cambridge? What is there to do on the west side? Sentence3: Yes. The guesthouse must include free parking and free wifi. Sentence4: You could always visit Churchill College. Sentence5: Oh dear. Can you try one more time? Moderate guest house, free wifi and parking, for 1 night, Friday, 4 people? I really need this room. Sentence6: Do you have any hotels with free wi-fi and parking in the moderate price range? Sentence7: I'm sorry, I have tried the Hobsons House and The acorn guest house for 3 nights. Could you possibly book a different day to check in? Sentence8: Could you help me find a moderately priced guesthouse? Sentence9: I'm sorry but the booking was unsuccessful. Would you like to book another day or for a shorter stay? Sentence10: You're welcome, please enjoy your visit to Cambridge. Sentence11: Lovell lodge does not have availability on Friday either. Would you like to try another guesthouse? Does the area matter? We could try kirkwood house, it is in the north. Sentence12: I'm sorry, but it's not available. Sentence13: Could you tell me if it is available for one night? Sentence14: I am sorry but the Carolina Bed and Breakfast is not available for one night either, may I check another guesthouse for you? Sentence15: I apologize for the trouble earlier. I managed to find you a guesthouse called The Hamilton Lodge and made a successful reservation. The reference number is EL0WI0ZV . Sentence16: Yes it will. Please book it for 4 people staying 3 night starting on Friday. Sentence17: I found 15 do you have any other requirements to help narrow it down? Sentence18: Sorry, I tried all 12 of the avaialble places with those requirements and there is no availability. Sentence19: Are there any other hotels available? Sentence20: That would be fine with me Sentence21: Yes. i have the Ashley North and the Lovell Lodge. Do you have a preference? Sentence22: Carolina bed and breakfast has free parking and internet. It is located in the east with a moderate price range. Will this suit your needs? Sentence23: Oh, thank goodness. I was getting worried. Can you recommend any fun things to do in the west side of town? Sentence24: No, that's all I need today. You have been very helpful. Thanks! Sentence25: Yes, please find another moderate guesthouse with free parking and wifi to book. Sentence26: Okay, what kind of attraction is that? May I have their postcode and phone number please? Sentence27: How about we try the Lovell Lodge, if that's okay? Sentence28: Hmmm ... let's try booking the Acorn Guesthouse for 1 night? 4 people, arriving Friday. Question: Who has spoken the sentence 25? (A) User (B) System
Output: 


Answer: (B) System