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: No, I don't need a reservation there. I do need a train from cambridge on thursday. I'll be going to Norwich, and I need to get there by 17:30. Sentence2: Yes please I would like to book. Sentence3: I need 3 tickets please. Sentence4: Thank you for using our service. Have a wonderful day! Sentence5: The Missing Sock is located at Finders Corner Newmarket Road, and their postcode is cb259aq. Would you like to reserve a table there? Sentence6: There is only one restaurant that fits what you are looking for and is called The Missing Sock. Would you like to book there? Sentence7: TR8604 will be arriving at norwich by 16:55 on Thursday. That is the closest to your requested time, would you like to book? Sentence8: Of course. It is 01223812660. Is there anything else I can help you with today? Sentence9: Great how many tickets will you need? Sentence10: Where in Cambridge is The Missing Sock located? Sentence11: Your booking was successful. The total is 52.8 GBP, payable at the train station. Your reference number is R22NVXLA . Is there anything else I can help you with? Sentence12: Hi, I'm going to visit Cambridge and am interested in finding a cheap restaurant that serves international type fare. Sentence13: that is it, thank you very much. Sentence14: Sure but can I also have the phone number as well? Sentence15: I would like a train that arrives at Cambridge at 17:30 Sentence16: Before we get to the train, you mentioned wanting to make a reservation at The Missing Sock. Would you like to do that? Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User