You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: I want to book a flight ticket from DCA to BOS. Could you help me in booking?

ASSISTANT: Sure, I will help you. Please send your travelling dates.

USER: My travelling dates are from Sep 27 - 29.

ASSISTANT: Do you have any preferences?

USER: I prefer for direct flight.

ASSISTANT: May I know your name?

USER: Elizabeth Davis.

ASSISTANT: There is a direct flight available with Hawaiian airline, shall I proceed?

USER: Yes, please proceed.

ASSISTANT: Your booking is done with flight number 1020. Happy journey.

USER: Thank you.

ASSISTANT: You are welcome, have a nice day.