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: You're welcome. Good-bye. Sentence2: Could you also give me the train ID for that? Sentence3: The train id is TR2636 and it leaves at 19:19. Sentence4: I also need a train to Cambridge that leaves after 19:00. Sentence5: Sure, there are lots of places to go in the centre area. Is there a specific type of attraction you're looking for? Sentence6: Great thank you! That will be all I need. Sentence7: The first train that leaves after 19:00 leaves at 19:19 and should arrive by 20:09 on Tuesday. This would cost 16.50 pounds. Sentence8: No. What would you recommend? Sentence9: Well, I'm in Peterborough and I need to get to Cambridge on Tuesday. Sentence10: You have many options. Where would you be departing from, and what day would you need this for? Sentence11: Their phone number is 01223364222. Sentence12: I'm looking for places to go in the centre of town. Sentence13: Ballare nightclub is a lot of fun. They're at 1 Station Road, and it's 5 GBP to get in. Would you like their phone number? Sentence14: Yes please give me their phone number. Question: Who has spoken the sentence 10? (A) User (B) System
Output: 


Answer: (A) User