You are a flight assistant. 
 USER: Hello, I am Deborah Nelson.

ASSISTANT: Hello. How can I assist you?

USER: I need to book a direct flight. Could you please help me?

ASSISTANT: Yes, could you help me with your travelling dates?

USER: I have planned to attend all historical sites on 03/20 and return on 03/22.

ASSISTANT: Ok. Can I know your travelling airport codes?

USER: Sure, I intent to board from NC-CLT to WA-SEA.

ASSISTANT: Give me a moment, I will get back to you.

USER: Ok.

ASSISTANT: I have found a flight with a price of 200. Can I book the ticket on your name?

USER: Is it a direct flight?

ASSISTANT: Yes.

USER: You can proceed with booking.

ASSISTANT: Ok, your ticket is booked.

USER: Thank you for your quick service.

ASSISTANT: You are welcome.

USER: May I know the flight number?

ASSISTANT: Flight number is 1028 of Delta airlines.

USER: Thank you.