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: Thank you, goodbye. Sentence2: I'm looking for a train on Thursday that need to arrive by 19:15. I'll be leaving Cambridge and heading to Kings Lynn. Can you help? Sentence3: Booking was successful, the total fee is 68.6 GBP payable at the station . Reference number is : 7E54PFPZ . Sentence4: All right then. Thanks so much for calling. If you think of anything else, please don't hesitate to call us back. Sentence5: I'm also looking for a recommended attraction in the centre. I don't care what type it is. Sentence6: I am planning a trip in Cambridge. Sentence7: I can help you with travel, restaurants, attractions and places to stay. Sentence8: the latest a train reaches your station is 05:58. can i book it for you? Sentence9: Yes, please. I need tickets for 7 people. Sentence10: There's Holy Trinity Church on market street in the centre, the architecture is amazing and entrance is free. Is there anything else you'd like to know about it? Sentence11: I only needed the train. Sentence12: enjoy your stay in cambridge Question: Who has spoken the sentence 1? (A) User (B) System
Output: 


Answer: (B) System