You are a flight assistant. 
 USER: Hello. I am Eric Williams.

ASSISTANT: Hello, how can I help you?

USER: I would like to visit my relatives home at Seattle, WA-SEA. Could you please help me with reserving a flight ticket from Boston, WA-SEA?

ASSISTANT: Sure, we are happy to help you. When do you want to travel and return?

USER: I would like to fly on 12/16 and return on 12/18.

ASSISTANT: Ok, May I know your budget?

USER: I can afford up to 1000 for a flight ticket.

ASSISTANT: Ok, please standby.

USER: I regret my source airport code is Boston, MA-BOS.

ASSISTANT: Ok. Thank you for your time, we found a connecting flight in UA airline with price 200. Shall I proceed for booking?

USER: You can proceed with booking.

ASSISTANT: Ok, the ticket has been booked with flight number 1009.

USER: Thank you for your assistance.

ASSISTANT: Thank you for choosing us.