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: 5 nights, please. Sentence2: Sure. Please book five tickets for me and reply with the reference number. Sentence3: It's booked and your reference number is LFE8G8CE . The address is 154 chesterton road and postcode is cb41da. Anything else I can do for you? Sentence4: Where will you be departing from? Sentence5: Enjoy your visit. Please give us a call if you need further assistance. Sentence6: 5 people starting on Sunday. Sentence7: Yes, what area would you like to stay in? Sentence8: Great, let's book that one. Please send me the address, postcode and reference number. Sentence9: Booking was successful, the total fee is 22 GBP payable at the station. Reference number is : BUBQRD4R . Sentence10: Yes I also need a train that leavers after 12:00 going to ely. Sentence11: There is the Acorn guesthouse in the moderate price range and 4 stars. It also has free wifi and parking. Sentence12: There is no train leaving 12:00, but train TR5484 leave 13:50 do you want to adjust your time? Sentence13: Don't care. but I'd like a place that's Moderately priced and offers free WiFi. Sentence14: East London. Thanks Sentence15: How many days do you plan on staying? Sentence16: That is all I need, good bye. Sentence17: How many people would you like it booked for and for what days please? Sentence18: Hi, I am hoping to find a 4 star hotel room. Can you recommend one for me? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System