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'd like to eat in the city centre, if possible. Got any reco on Chinese places? Sentence2: Hello, I'm trying to take a train on Wednesday that leaves from Broxbourne. Can you help me book a ticket? Sentence3: Thanks, I'm also looking for an expensive restaurant. Sentence4: Sure, which part of town are you interested in eating at? Sentence5: It doesn't matter, as long as I can book it for 6 people. I will need the reference number please. Sentence6: Try it for 18:45 on the same day Wednesday, and please give me the reference number. It will be for 6 people. Sentence7: You are quite welcome! Sentence8: That should be it. Thanks for your help! Sentence9: We have four: HK Fusion, Sesame Restaurant and Bar, Ugly Duckling, and Tang Chinese. Sentence10: I have 13, is there a time youd like to arrive by? Sentence11: I really need one that leaves after 11:00. Sentence12: Sure I can help you with that. I have train TR0788 leaving at 05:32 and will arrive to cambridge at 06:32. Sentence13: I have booked a reservation at HK Fusion. Your reference number is XO4S9CL7 . Do you need anything else? Sentence14: I am sorry but I was unable to book you at any of those restaurants. Would you like to try another time? Sentence15: Pick one for me. Book it for the same group of people at 18:45 on the same day. Sentence16: They are all expensive. Would you like to try an early time? Sentence17: Are any of those expensive? Sentence18: Success! TR5953 departs at 11:32 and arrives 12:32. Your reference number is EQCLFB3Q . Question: Who has spoken the sentence 16? (A) User (B) System
Output: 


Answer: (A) User