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: Okay, what day and what time would you like to leave? The ride is about 49 minutes and the train comes every two hours. Sentence2: Yes, please. I need 4 tickets. Sentence3: Yes. I need to find a train to travel from Stevenage to Cambridge. Sentence4: Actually, can I get the address and phone number please? Sentence5: Great! That was successful and your booking reference number is NXSAEV12 . Sentence6: No, just pick something. Sentence7: That should do it. thank you! Sentence8: The Cambridge Contemporary Art Museum is a good attraction that is free. Would you like the address or directions? Sentence9: What good attractions are there in the city centre? Sentence10: I need to leave Saturday and must arrive by 20:00. I don't care what time the train leaves as long as I arrive on time. Sentence11: Sure, it is located at 6 Trinity Street. The phone number is 01223324222. Can I help you further? Sentence12: Ok great! I hope that you enjoy your travels! Thank you for contacting the Cambridge TownInfo centre. Sentence13: I have train TR2442 leaving stevenage at 17:54 and arriving in cambridge at 18:43. Would you like to book this? Sentence14: There are over 40 of them, many of which are free; did you have anything more specific in mind? Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User