You are shown a conversation between a user and system. Identify who has spoken the indicated sentence based on the conversation.
Q: Sentence1: When will you be traveling? Sentence2: Thanks. I am also looking for a train to Broxbourne from Cambridge. Sentence3: Train TR9531 leaves Cambridge at 16:01 and arrives in Broxbourne at 17:01. That is the last train of the day. Would you like to make a reservation? Sentence4: Yes, please. I need 7 tickets. Sentence5: Did you have a specific departure or arrival time in mind? Sentence6: The price range is on the expensive side and I would like if they provide free wifi and parking. I want the hotel to be located on the north side. Sentence7: I need to arrive by 18:00, please. Sentence8: Your reference number is 4HRLU45B, is there anything else you need? Sentence9: Yes, I would like to find a hotel in the south. Sentence10: We don't have any hotels that fit your criteria. Would you like to search for something a little different instead? Sentence11: I am leaving on Thursday. Sentence12: Thank you for using the Cambridge TownInfo centre. Goodbye. Sentence13: Hi, I could use some help with information on places to stay. Sentence14: Okay, the booking was successful. The reference number is FGOM35JV . Sentence15: No, that's all I need from you, Thanks! Sentence16: That sounds perfect. I need it for 3 nights and 7 people will be staying starting Monday. Sentence17: The Lensfield Hotel at 53-57 lensfield road is a fabulous 3 star hotel that offers internet and parking. Would you like me to book you a room there? Sentence18: Yes, I can help with that. What area would you like to stay in and what is your price range? Question: Who has spoken the sentence 16? (A) User (B) System
A: 
Answer: (A) User