You are a flight assistant. 
 USER: Hello. I am Steven Davis.

ASSISTANT: Hello, how may I assist you?

USER: I need to make a plane reservation on dates from 08/27 to 08/29 to attend a college farewell in between this dates?

ASSISTANT: Sure, we can book your trip right now.

USER: Thank you.

ASSISTANT: What city are you flying to?

USER: I need to reach SFO as my farewell party is going to held in San Francisco.

ASSISTANT: Ok, how much airfare are you looking for?

USER: I would like to be booked on the least expensive flight. Make sure the price should not exceed 500.

ASSISTANT: Which airport would you like to fly out from?

USER: I would like to board at BOS as my nearest airport code.

ASSISTANT: Do you need a stop over in between your route from BOS to SFO?

USER: I need a connecting flight in between my journey.

ASSISTANT: There is a AA airline with flight number 1004 that leaves from BOS and arrives at SFO on your required dates and the ticket fare is 300.

USER: Ok, proceed for booking.

ASSISTANT: Your request for booking has been processed successfully.

USER: Thanks for your information.

ASSISTANT: Thank you for opting us.