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: The restaurant is all booked, reference is QAHKT2ZI . Sentence2: Yeah, and I would also like a taxi to get to the Meghna from the Tenpin by the reservation time, 12:30. I will need the contact number and car type. Sentence3: Tenpin is located on the south side, cambridge leisure park, clifton way. It's phone number is 08715501010. Do you wish to know more? Sentence4: Well I really need something on the west side. What about moderately priced Indian food? Sentence5: Sure. Can you book a table for 2 people at 12:30 on Sunday? I'll need the reference number please. Sentence6: Yes, could you tell me what type of attraction this is? Sentence7: Tenpin's number is 08715501010. I've booked you a taxi in a black ford, contact number is 07634445815. Can I help you with anything else today? Sentence8: Can you also help me find an attraction called Tenpin? Sentence9: There is "international" cuisine. Can you elaborate on what you mean by Crossover? There are places that serve what we call "Modern European" food. Sentence10: No, you have been very helpful. Thank you for everything. Sentence11: OK, great, I'm glad you are satisfied. Have a nice time! Sentence12: Are these places in the moderate price range? Sentence13: There is one Indian restaurant on the west side that is moderately priced. It is the Meghna. Would you like to book a table there? Sentence14: I have The Varsity or Bloomsbury restaurants that both serve international food, are located in the city center and are in the moderate price range. Sentence15: I just need to make sure the taxi will arrive at the restaurant by the booked time of 12:30. Sentence16: I have scheduled the arrival at 12:30. If you would like me to change the time, I can certainly do that. Sentence17: Sure, it's an entertainment venue, did you want their phone number? Sentence18: I'm looking for some places that serve crossover food. Question: Who has spoken the sentence 17? (A) User (B) System
Output: 


Answer: (B) System