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: Thank you for your help. Sentence2: do you have one with a star of 4? Sentence3: You're welcome, and have a great day. Sentence4: yes please tyhat you for all your help Sentence5: OK, you have 7 tickets reserved on TR6939. Total due at the station will be 116.2GBP. Your reference number is OK7WYTNQ . Sentence6: Try either one of the cheap ones, I need one that can hold my group of 7 for 5 nights on tuesday. Sentence7: Yes, I'll need 7 tickets. Sentence8: I also need a place to stay. 2 star is my preference. Sentence9: I would like to arrive in Cambridge by 08:45. Sentence10: We have 10 different trains on that day. Do you prefer a particular time? Sentence11: No, thank you. That will be all. Sentence12: TR6939 is your best option. It will leave at 05:39 and arrive at 07:07. Would you like to book passage on that train? Sentence13: In the west part of town. The price doesn't matter. Sentence14: the cambridge belfry was the best match for a large group so I booked you there, the reference number is X33MYBK5 , may I assist with anything else? Sentence15: Have a great time. Sentence16: I do. We have three options. Two that are cheap and one that's expensive. Do you have a preference? Sentence17: I need help finding a train. Can you do that? Sentence18: I don't have any 2 star hotels in that area. Would you like a different area or a higher rated hotel? Sentence19: Okay, do you need a reference number? Sentence20: Of course. Where are you traveling to? Sentence21: I would like to leave Liverpool street on Tuesday and arrive in Cambridge. Sentence22: okay, what area and price range? Question: Who has spoken the sentence 15? (A) User (B) System
Output: 


Answer: (B) System