You are a flight assistant. 
 USER: Hello, I am Matthew Martin.

ASSISTANT: Hello, how may I render you?

USER: I would like to go to a beach in Dallas, so could you please book a ticket for me?

ASSISTANT: Sure. Please send your journey dates.

USER: I would like to go on 06/19 and return back on 06/21.

ASSISTANT: Can I have your nearby airport codes?

USER: My source and destination airport codes are DCA and DFW.

ASSISTANT: Can I have a while please?

USER: Ok, ensure it is a single connecting flight.

ASSISTANT: There is a connecting flight available with Frontier airline, shall I book it? It's price is 100.

USER: Ok, please proceed for further.

ASSISTANT: Your booking is done with flight number 1023. Happy journey.

USER: Thank you for booking.

ASSISTANT: You are welcome. Thank you for reaching us, have a nice day.

USER: Welcome.