You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: Is there any place to go swimming here? Sentence2: That I do: 01223902088. Sentence3: What is the travel time? Sentence4: The travel time is 88 minutes. Can I book seats? Is there anything else I can help you with today? Sentence5: We have that! How about jesus green outdoor pool in the north. Sound fun? Sentence6: That does sound fun, but I'm looking for a swimming pool in the east. May I please have the entrance fee and address for one? Sentence7: TR8580 leaves 23:39 and costs 13.28 pounds.can we book? Sentence8: abbey pool and astroturf pitch is in the east, the address is pool way, whitehill road, off newmarket road and the entrance fee isn't listed I'm afraid. Sentence9: Do you have a phone number for them? Sentence10: I also need a train from London Liverpool Street to Cambridge on Sunday. I need to arrive by 09:45. Question: Who has spoken the sentence 3? (A) User (B) System
A: 
Answer: (B) System