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: thanks for all your help. You've been great. Have a nice day. Goodbye. Sentence2: The star rating is not important. Either of those will do. Can I just get the name of one and the address please? Sentence3: No thanks, can you help me find a nightclub to go to? Sentence4: I also need a taxi. Ill need to leave club salsa by 15:45 and go to bridge guest house. Sentence5: Great we have 33 places, do you have anything to narrow it down? Sentence6: No problem! Is that all I can help you with today? Sentence7: Somewhere in the south would be ideal. Sentence8: There are several nightclubs in the centre and one in the south. Are you looking for anything in particular? Sentence9: There are 2 guest houses in the south part of town both have parking and internet. Do you want a 4 or 3 star room? Sentence10: Bridge guest house is located at 151 hills road. Would you like to book? Sentence11: We have 15 moderate priced Guesthomes available that may suit your needs, is there a certain area or star rating you are interested in? Sentence12: i booked your taxi. there will be a black lexus coming for you. their phone number is 07229053145. Sentence13: I am looking for a place to stay. Sentence14: OKay that's perfect thanks so much. Sentence15: I'd like a moderately priced guesthouse. Sentence16: Yes, I recommend Club Salsa on 1 Station Road. It costs 5 pounds to get in. Sentence17: There are two: Aylebray Lodge Guest House and Bridge Guest House. Do either of those sound appealling? Sentence18: You're welcome. I hope you enjoy your trip. Sentence19: Not sure yet. Does either have free parking? I also need free wifi. Sentence20: No, can you recommend your favorite one? Sentence21: Thank you. I'll need the contact number and car type, please? Sentence22: Okay let me work on booking that for you! Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System