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: Where will you be departing from? Sentence2: Can I look up anything else for you? Sentence3: I don't need it booked at this time. Thanks for the information. Sentence4: how about acorn guest house? it's lovely Sentence5: Is it available for 7 people for 4 nights starting from Friday? Sentence6: OK. Please let me know if you need anything else. Sentence7: You, too. Thank you for calling. Goodbye. Sentence8: Booking was successful. Reference number is : 98H31LT2 . Sentence9: I do not have anything there. Any other place you might like or criteria? Sentence10: Thanks! I think that's all I need, but let me check with my wife. Sentence11: The TR4351 from Leicester to Cambridge on Friday departs at 15:09 and arrives at 16:54. There are some that are earlier as well. Shall I book it for you? Sentence12: I will be departing from Leicester on Friday. Sentence13: Ah, she reminded me, I need a train to Cambridge that arrives by 17:45. Can you recommend one, please? Sentence14: No thanks, I don't need anything else right now. Have a great day though! Sentence15: I need a hotel with free parking and a four star rating. Should also be in the east. Sentence16: Yes try the north please. Sentence17: I need a place to stay out in Cambridge. Can you help me book one? Sentence18: I just need more information to find the perfect place for you. What area are you interested in staying in and the price range? Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User