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: Booking was successful. Reference number is : AOJGD8XG . Is there anything else I can help you with today? Sentence2: Sure, I am fond of the acorn guest house personally. Did you have a price range that you'd like to stick to? Sentence3: It's been a pleasure. Have a good day. Sentence4: I'm not too concerned about price. Is the Acorn Guest House in the north section of Cambridge? Sentence5: yes, i want to book it for 8 people and 3 nights starting from wednesday Sentence6: Sure thing, will you be needing a reference number? Sentence7: Certainly. What is your intended destination and travel time? Sentence8: Yes, Christ's College is on Saint Andrew's Street and the post code is cb23bu. It's free admission. Sentence9: Yes, I am looking for a multiple sports attraction in the centre. Sentence10: How about a type of college? Could you provide me with the postcode, entrance fee and address? Sentence11: I'm sorry, but there are no multiple sports type attractions in the centre. Would you like to try a different area? Sentence12: Okay, you're all set. I booked a blue honda and the contact number is 07846176365 Sentence13: Yes it is. Are you wanting to make a booking. Sentence14: Thank you! I also need a taxi please. Sentence15: Hi, I am planning my upcoming trip and am looking for a place to stay. Can you recommend something for me? Sentence16: Thanks so much. You took care of everything I needed. Thanks. Goodbye. Sentence17: Yes please. I will need that. Sentence18: I need to leave the attraction by 21:00 please. Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User