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: TR6247 leaves Leicester at 14:09 Friday and arrives in Cambridge at 15:54. Will that work for you? Sentence2: I'd like whichever arrives by 16:15 please. Sentence3: Alright. Booking was successful. Your reference number is 87MI5OVY . Sentence4: There are trains running from Leicester to Cambridge every hour from 5:09 to 23:09 on Friday. Did you have a particular time in mind? Would you like to book tickets? Sentence5: Can you help me find a train please? Sentence6: Where are you leaving from, please? Sentence7: You're welcome. Have a great day. Sentence8: Thanks for your help. That's all I need. Sentence9: What day would you like to leave? Sentence10: Sure! Where are you headed? Sentence11: Friday is preferable. Sentence12: That will be fine. book for 3 people Sentence13: I am headed to Cambridge this week. Sentence14: I will leave from Leicester. Question: Who has spoken the sentence 6? (A) User (B) System
Output: 


Answer: (A) User