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: OK, thanks, that's all I need. Sentence2: TR4216 arrives in Stevenage at 18:10. Total travel time is 49 minutes, and the per person fare is 10.24 GBP. Sentence3: The first train out of Cambridge to Stevenage after 16:30 is the TR4216, which leaves at 17:21. Sentence4: I am looking to go from cambridge to stevenage on saturday leaving after 16:30 Sentence5: Club Salsa is a nice one, phone is 07782218745. Anything else you need? Sentence6: Okay great. Glad I could be of assistance. Sentence7: Certainly. Just to confirm, is Cambridge your destination or are you looking for another destination? Sentence8: Have a good day. Bye. Sentence9: I also need a train leaving Stevenage on Saturday, please. Sentence10: Thank you for choosing Help Desk. Sentence11: There are 5 good nightclubs in the centre and one in the south. Which area do you prefer? Sentence12: Hi, do you know of a good night club? Sentence13: It doesn't matter. Can I have the phone numbers? Sentence14: Can you tell me the time it arrives, and the price? Question: Who has spoken the sentence 9? (A) User (B) System
Output: 


Answer: (B) System