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: And where will you be departing from? Sentence2: 17.60 pounds. Would you like me to book a ticket? Sentence3: Okay great, have a good day! Sentence4: What's their phone number? Sentence5: Yes, I'm also looking for a train to Cambridge that will leave sometime after 17:45. Sentence6: Their phone number is: 01223302580. Is there anything else I can help you with? Sentence7: The booking was successful. Your total fee is 17.6 GBP and you can pay it at the station. Your reference number is VPMQDFKF . Sentence8: The TR3342 leaves at 18:16. Would you like a booking? Sentence9: That's a nice free park in the south, the address is fen causeway, newnham road. Is there anything else you need help with? Sentence10: Can you book it for me and get a reference number ? Sentence11: That was all thank you. Sentence12: How much are the tickets for one person? Sentence13: I was wondering if you can tell me more about the attraction called sheep's green and lammas land park fen causeway? Sentence14: I am leaving from Norwich on Wednesday evening. Sentence15: Thanks for everything, you were helpful. Sentence16: Is there anything else that I can help you with? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User