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: OK, you're booked on TR7062, leaving at 16:40 and arriving by 17:08, reference number 1MSVTP4G . The price will be 10.10 at the station. Can I help you with anything else? Sentence2: Okay. Thank you very much. Sentence3: Thank you, have a nice time. Sentence4: I'm looking for a train that leaves from cambridge after 15:45 Sentence5: Can I have their post code and phone number please? Sentence6: The earliest train after 15:45 leaves at 16:40. Would you like me to book you a seat? Sentence7: Is there anything else I can help you with? Sentence8: Yes, I was wondering if you could help me find ou abou an attraction called gonville and caius college. Sentence9: I'd like to travel to stansted airport. Sentence10: There are many trains, please tell me a destination to help narrow it down. Sentence11: Yes, I would like to book one seat that leaves on Sunday. Please provide the price, arrival time and train ID. Thank you. Sentence12: No I think that should do it. Thanks. Goodbye. Sentence13: Gonville and Caius College is in the centre of town and entrance is free. Is there anything else you would like to know? Sentence14: Sure there phone number is 01223332400 and postal code is cb21ta. Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User