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: Booking was successful, the total fee is 35.79 GBP payable at the station . Reference number is : N5FLMFK9 . Anything else you need? Sentence2: There are several trains available for you. Where are you departing from and what day would you prefer? Sentence3: Is there a time you would prefer to arrive? Sentence4: I'm looking for a train schedule after 15:15, going to Cambridge. Sentence5: i'm leaving from broxbourne to leave on saturday after 15:15 Sentence6: No, but I would like the booking made for two people. Sentence7: I'm glad we could help. Have a nice day. Sentence8: Sure thing! Your reference number is D1CJSO6Z . Sentence9: Thank you for your help! Sentence10: Yes, can you try for 18:45 instead? Sentence11: That is all, thanks again. Sentence12: I'm sorry, they didn't have that time available. Would you like to try a different time or a different day? Sentence13: Yes I have pizza hut city centre located at regent street city centre. Would you like to make a table reservation? Sentence14: Did you need any further assistance today? Sentence15: Yes, are there any italian restaurants in the center of town? Sentence16: Yes please. Can you book it for Saturday at 19:45 for 2 and get me a reference number? Question: Who has spoken the sentence 8? (A) User (B) System
Output: 


Answer: (A) User