You are a flight assistant. 
 USER: Hi. I am Frank Davis.

ASSISTANT: Hello. How may I assist you?

USER: I am planning to go for Washington-DCA, can you please help me in booking my flight ticket?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: My trip dates are 04/16 to 04/18.

ASSISTANT: May I know your origin airport code please?

USER: My source is CLT.

ASSISTANT: Wait a moment please.

USER: Sure.

ASSISTANT: Delta airlines is available in your route with the ticket fare of 200, shall I proceed with the booking?

USER: You can reserve it.

ASSISTANT: Your ticket is booked with the flight-1018.

USER: Thank you for booking.

ASSISTANT: Thank you for reaching us.