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: Might I recommend the Whale of a Time entertainment venue? Sentence2: Cambridge. Should leave after 15:00 Sentence3: I have everything. Thanks Sentence4: The 15:35 will be fine. Please book that for four people. Sentence5: Sure. May I have the phone number please? Sentence6: Can I get a train departing ely and leaving on wednesday? Sentence7: I'm looking for someplace to go in the west. Sentence8: There are 10 trains that leave Ely on Wednesday, what is your destination? Sentence9: There are 5 trains leaving after 15:00. The times are 15:35, 17:35, 19:35, 21:35 and 23:35. Which would you like? Sentence10: Okay, I have four tickets booked on the 15:35 train from Ely to Cambridge on Wednesday. Total is 17.6 GBP, reference number UKD02OC6 . Anything else I may help with? Sentence11: Glad to have been of service. Thank you and have a good day. Sentence12: Of course, it is 01954781018. Is there anything else I can assist you with today? Question: Who has spoken the sentence 2? (A) User (B) System
Output: 


Answer: (A) User