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 need a train from london kings cross to cambridge please. Sentence2: Broughton house gallery is always lovely. That's located right in the centre and it's free to visit. Does that work? Sentence3: There are 23 options. Would you like to search by area? Sentence4: How about the centre? Sentence5: I need a train that leaves after 10:15 on Tuesday. Sentence6: That's great to hear, I'm so glad to be of service. If at any time you need information about our lovely towne please remember to contact the Cambridge TownInfo centre! Sentence7: No, that's all! Thank you so much for your help! Sentence8: Yes, that would be perfect, please book that for 6 people please. Sentence9: Yes. May I have their postcode please? Sentence10: I've got a train leaving 11:17 and arriving at 12:08, will that work for you? Sentence11: There are 70 trains leaving from London Kings Cross to Cambridge. Is there a particular time slot you would like? Sentence12: Your total fee is 141.6 GBP payable at the station and your reference number is UQ49PB37 . Sentence13: I'm also looking for a museum in town. Can you recommend something? Sentence14: Their postcode is cb11ln. Anything else? Question: Who has spoken the sentence 11? (A) User (B) System
Output: 


Answer: (B) System