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: What about a moderately priced European restaurant? I need a reservation for 3 people at 14:30 on Thursday. Could you provide the reference number after making the reservation? Sentence2: I'm sorry, I do not show any Swedish restaurants. Is there another type of restaurant I could find for you? Sentence3: The departure time is still the same, 7:29. Sentence4: TR3450 leaves at 7:29. Can I help you with anything else today? Sentence5: If I may, might I suggest The Michaelhouse Cafe. They are located at St. Michae's Church Trinity Street City Centre. They have amazing food. Sentence6: train TR2061 should fit you. Sentence7: Are there any Swedish restaurants in Cambridge? Sentence8: Sounds like an excellent choice. Please proceed with making a reservation. Thanks! Sentence9: Yes an you search for christmas food? Sentence10: There are 11 different restaurants serving European food. What area of town would you like? Sentence11: I don't have a preference on the area. If you could recommend on that would be great. Sentence12: I am sorry I do not have anything listed matching that request. Any other type of food? Sentence13: I actually need the train to arrive at Bishops Stortford, not depart from. So sorry for the confusion. Sentence14: You're all booked. Reference number is OBL5NIMY . Sentence15: Alright. That is all I needed. Thank you very much. Sentence16: Have a great time. Sentence17: I also need a train to leave Friday and arrive by 08:15 from bishop stortford by cambridge. Can you give me the depart time? Sentence18: Great, can you tell me the departure time of the train from Cambridge to Bishops Stortford? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User