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: THanks, please book it for 8 people. I'll need to reference number Sentence2: Is there one that leaves after 10:00? Sentence3: Yes, the TR8659 leaves at 10:09. Sentence4: Of course. No problem. Can we help you with anything else? Sentence5: That's perfect! Thank you for your help! Sentence6: What are you interested in? There's architecture, colleges, cinemas, etc. Sentence7: No, that is all for today. Thank you for your help. Goodbye Sentence8: Train TR3190 Leicester to Cambridge leaves Friday at 6:09. Would you like me to book it for you? Sentence9: i am also looking for places to go in town. The attraction should be in the centre. Sentence10: It doesn't really matter, as long as it is in the centre. I will just need the address, postcode, and phone number. Sentence11: Thank you for using our service today. Sentence12: Booking was successful, the total fee is 302.39 GBP payable at the station . Reference number is : IOJTYL4C . Can I help you with anything else? Sentence13: I need to take a train here on Friday, I will be coming from Leicester. Sentence14: May I recommend the primavera museum in the centre of town located at 10 king s parade in post code cb21sj. Their phone number is 01223357708 Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User