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: I have no hotels in this area, only guesthouses. Would that work? Sentence2: I am looking for information in Cambridge Sentence3: Okay. Your booking was successful! The reference number is ZWH6Y40Y . Can I help with anything else today? Sentence4: If you take the train departing Ely at 19:35 you will arrive by 19:52, and the cost is 4.40. Sentence5: that's fine, can you book one? Sentence6: What type of information can I help you with? Sentence7: Well, price should be in the moderate but i do want a 4 star hotel. Sentence8: We have quite a few to choose from. Do you have a preference in price range or the area of town? Sentence9: Thank you for choosing help desk. Have a wonderful day. Sentence10: I would recommend avalon, which is a 4 star guesthouse in the north. Will that work for you? Sentence11: The earliest train that days leaves at 19:35 will this work? Sentence12: Yes that works. What is the arrival time and price please? Sentence13: That was all I needed. Sentence14: Yeah, that will be fine. It will need to be on the same day for 3 nights and 3 people. Sentence15: Thanks! I'm also looking for a 4-star accommodation with free wifi. Sentence16: I'll be leaving from Ely on Tuesday after 17:45. Are there any trains available then? Question: Who has spoken the sentence 12? (A) User (B) System
Output: 


Answer: (A) User