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: Sure. Where are you traveling too and what time would you like to leave? Sentence2: No preference on departure time, but I will need to book for 5 people. Sentence3: I have 4 trains that will arrive by 9:15 in Cambridge. What time would you like to depart Stansted Airport? Sentence4: The admission is free. Sentence5: Ok, thanks. Can I get the phone number and postcode as well? Sentence6: Post code is cb23bu and phone number is 01223334900. Is there anything else I can assist you with today? Sentence7: That is everything thank you. Sentence8: It was my pleasure to help. Have a good day. Sentence9: There are several colleges in the centre. May I suggest christ's college or downing college, both have free entrance fees. Sentence10: Yes, I'm looking for a college to visit in the centre of town. Sentence11: I need a train departing from Stansted Airport on Friday. Sentence12: Reference number is : 1LD6SOW1 . Anything else? Sentence13: what's the entrance fee for christ's college? Sentence14: I need to arrive in Cambridge by 9:15. Question: Who has spoken the sentence 3? (A) User (B) System
Output: 


Answer: (B) System