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: What area are you looking to stay in? Sentence2: That sounds good. Can I get that for 8 people for 4 nights starting Thursday? Sentence3: I need place to stay with free wifi. Sentence4: I have quite a few that fit your description. What price range are you looking for? Sentence5: What day do you want to travel? Sentence6: I need to take a train from Cambridge to Stansted Airport I need to arrive by 14:45 Sentence7: I need to go on Thursday, please. Sentence8: Thank you! That is all that I need! Sentence9: TR0521 will depart at 13:40 and arrive at 14:08. The 28 minute trip will cost 10.10 pounds. Would you like to book a ticket? Sentence10: I have made those reservations and your reference number is YCL4D5P6 . Sentence11: Yes please and provide me with the reference number as well. Sentence12: It doesn't matter. I like 4 star guesthouses though. Sentence13: Booking was successful, the total fee is 10.1 GBP payable at the station. Your reference number is TDPEQ21Q . Do you need anything else? Sentence14: I'd prefer something in the moderate price range. Sentence15: If that is all, then thank you for reaching out to the Cambridge TownInfo centre. Goodbye. Sentence16: I recommend the Arbury Lodge Guesthouse in the north. It meets your specifications. Would you like help in booking it? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User