You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you?

USER: Can you aid me in booking a flight ticket from DCA to IAD?

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

USER: Sure, I would like to go on Nov 25th and return back on Nov 27th.

ASSISTANT: Do you have any preferences?

USER: Make sure the depart time is in the morning.

ASSISTANT: May I know your name please?

USER: Myself Lisa Young.

ASSISTANT: There is a connecting flight available with Frontier airline, shall I proceed?

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1007. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome, have a nice day.