You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Brandon Smith.

ASSISTANT: How may I assist you?

USER: I want to book a ticket from DCA to EWR to attend seminar, can you help me in booking?

ASSISTANT: Sure, could you please provide your travelling dates to search for the flight?

USER: I am departing on 12/27 and return on 12/29.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: There is a flight 1009 from Hawaiian airlines, shall I proceed?

USER: Please proceed for booking.

ASSISTANT: Your booking is done.

USER: Thank you for your help.

ASSISTANT: Welcome.