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: I need to go to london kings cross by train Sentence2: Not yet. Can you just give me the phone number and postcode of the Worth House? Sentence3: How many stars would you like? Sentence4: Anything leaving a little bit earlier but after 15:30? Sentence5: Thank you for using Cambridge TownInfo centre. Please consider us for your future travel needs. Sentence6: Actually, that is the earliest train available that leaves after 15:30. The next train before that departs at 15:00 which wouldn't fit your criteria. Would you like to book any tickets? Sentence7: The North, please. Also, I would like a guesthouse in the cheap price range. Sentence8: Okay! Do you know where you want to depart from or the day of the trip? Sentence9: TR6626 leaves Cambridge on Friday at 17:00. Would that work for you? Sentence10: I guess that will have to do. Go ahead and book it. Sentence11: I can help you with that, but let me gather a few more details. What area of town would you like to visit? Sentence12: yeah. Cambridge to london kings cross.The train should leave after 15:30 on Friday Sentence13: Why thank you for your kind help! Sentence14: I will. Thanks for all the help! Sentence15: Thank you and enjoy your stay in Cambridge. Sentence16: The booking was successful. Your reference number is 23ELORQB . Sentence17: You're welcome. Is there anything else I can do for you? Sentence18: There are two options. City centre noth b and b and worth house. Would you like to make a reservation at one? Sentence19: Any is fine, as long as it has free parking. Sentence20: I also need a place to stay. Sentence21: Sure. The phone number is 01223316074 and the postcode is cb41da. Sentence22: That was all I needed today, thank you! Question: Who has spoken the sentence 13? (A) User (B) System
Output: 


Answer: (B) System