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: Thanks, that is all the information I need. Have a great day. Sentence2: Thank you and have a great day! Sentence3: I need to book the train for 7 people. Are you able to do that for me and provide me with a reference number please? Sentence4: I'm also looking for this place called Castle Galleries? Sentence5: I need the post code please. Sentence6: No problem, enjoy your trip. :) Sentence7: Your booking was successful and your reference number is JA1FRX8K . Anything else I can help you with today? Sentence8: The postcode is cb23bj. Sentence9: I need to leave from Peterborough on Sunday. Sentence10: Okay I can book you a trip on train TR5662, leaving at 07:19 and arriving by 08:09. How many tickets would you like? Sentence11: I am looking for a train to Cambridge leaving by 13:45 Sentence12: There are many trains relevant to your search. Please tell me where you are departing from. Sentence13: Castle Galleries is a museum at unit su43, grande arcade, saint andrews street. Is there anything else you'd like to know about it? Sentence14: Ok, thanks for all your help regarding my requests. Question: Who has spoken the sentence 7? (A) User (B) System
Output: 


Answer: (B) System