Hello, Raymond Williams here.
Hello Raymond.
I  like to book my ticket from BOS to SFO. On 10/26, I like to go and come back on 10/28.
Sure,there is a flight based on your criteria.
Price limit is 200 and connection only 1, I can prefer.
Sure,there is a flight  which fulfils your requirements. Can I proceed with the booking?
Oh that's great. Yes, u can proceed my ticket booking.
OK,your ticket has been booked.