You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Express by Holiday Inn Cambridge is in the expensive range and offers free wifi and free parking, would you like me to make a reservation for this hotel? Sentence2: TR4651 departs at 15:29 and arrives at 16:07. Would you like me to book that for you? Sentence3: I am looking for a train departing Bishops Stortford and going to Cambridge. Sentence4: Booking was successful, the total fee is 16.16 GBP payable at the station. The Reference number is: SDRN9BTG . Sentence5: Yes, please. A hotel with 2 stars with free wifi is fine. Sentence6: Yes, two tickets please. Sentence7: The address is 15-17 norman way, coldhams business park. Can I help you find anything else today? Sentence8: How about a and b guest house? Sentence9: Great, thanks. I am also looking for a hotel in town. I would need free wifi, but I don't care about parking. Sentence10: There are three choices. Would you like a list or to make a reservation at the top choice? Sentence11: The A and B actually has 4 stars. There are 3 accommodations with 2 stars, though. They are all hotels, rather than guesthouses. Would one of those be to your liking? Sentence12: Which one is the best that offers free wifi and free parking and can I get their address please? Sentence13: I am looking for something in the 2 star range. Is that 2 stars? Sentence14: Thank you for using our system! Sentence15: I would like to leave on Sunday sometime after 15:15. Sentence16: No reservation at this time but I would like the address please. Sentence17: That should be all for today. Thank you. Sentence18: I can definitely help with that. There are a lot of trains to choose from. Did you have a travel day and time in mind? Question: Who has spoken the sentence 3? (A) User (B) System
A:
Answer: (B) System