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 am departing from Ely. Sentence2: Di you find me a train? Sentence3: Let's try the graffiti. I need their phone number, address, and the post code please. Sentence4: Hello, I am looking for info on a restaurant in the west that serves french food. Sentence5: What day would you like to travel and do you have a specific departure time in mind? Sentence6: I TR0212 the total fee is 4.4 GBP payable at the station and the reference number is : RWIT4QLJ . Sentence7: There are no French restaurants in the west. Would you like to try a different part of town or a different type of food? Sentence8: The train should leave on friday and departure time doesn't matter as long as it arrives by 13:15. Sentence9: Thanks. I also need a train ticket. The train needs to arrive by 13:15 and go to cambridge please. Sentence10: Where will you be departing from? Sentence11: consider it done, Sentence12: What about an expensive place that serves British food? Sentence13: The phone number is 01223277977. The address is Hotel Felix Whitehouse Lane Huntingdon road postcode cb30lx. Sentence14: Yes, that's right. Sentence15: I have two that meets that criteria. I would like to recommend the graffiti it is in the west side and serves british food. Sentence16: There are no expensive french restaurants in the west? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System