You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I aid you today?

USER: Can you render me in booking a flight ticket from DCA to CLT?

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

USER: Thank you. I am planning to start on Apr 16th and return back on Apr 16th.

ASSISTANT: Ok, do you have any other specifications?

USER: Sorry, I want to return back on Apr 18th. Make sure that it is a direct flight.

ASSISTANT: Ok, hold on for a moment. Let me check the best available flight for you.

USER: Take your time.

ASSISTANT: I found a flight for you with Frontier airlines and it costs you 100. Shall I proceed?

USER: Yes, you can go ahead.

ASSISTANT: On whose name you would like to book this ticket?

USER: Book the ticket on the name William Phillips.

ASSISTANT: Your ticket has been booked with 1021 flight number William Phillips.

USER: Thank you for the support.

ASSISTANT: Welcome, thank you for choosing us. Have a great day.