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: No I am good to go now. Thanks, bye! Sentence2: Your reference number is ZJ0BD7WY . Is there anything else I can help you with today? Sentence3: Sure, your booking was successful. The table will be reserved for 15 minutes. Reference number is : P8B1BVO7 . Anything else I can help with? Sentence4: You're welcome and enjoy your stay. Sentence5: Okay, I want to book that restaurant for 1 person Sentence6: I'm looking for a 3-star hotel that offers free wifi Sentence7: Sorry, I don't see anything matching that query. Would you like to try a different price range or area? Sentence8: There is pizza hut fen ditton in the moderate price range in the east Sentence9: actually, is the hamilton lodge a guesthouse? I'd prefer a cheap guesthouse. Sentence10: What time would you like the reservation for? Sentence11: There are several options is there a specific area you are looking for? Sentence12: Okay, the Hamilton Lodge matches your specifications. Would you like me to book a reservation for you? Sentence13: Hamilton Lodge is a guesthouse but it is in the moderate price range. There is a cheap guesthouse called Worth House that's rated 4 stars. Want more information on that one? Sentence14: Can you book it for Sunday and give me a reference number please.. Sentence15: Can you find one in the east with a different price range? Sentence16: Again, there are no restaurants matching your query. Please try a different price range, area, or food type. Sentence17: I would like the reservation on the same day at 11:00. Sentence18: That sounds acceptable. Can you please book a room for me starting on Wednesday? It will only be me and I will be staying 5 nights. Sentence19: Do you have one in the east, in the cheap price range? Sentence20: I am also looking to get some Italian food. Sentence21: I have found several Italian restaurants. Is there a particular area or price range you are looking for? Sentence22: I would prefer the North. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User