You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: Can you help me to book a direct flight ticket?

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

USER: Thank you. My preferable journey dates are Apr 25 and Apr 27.

ASSISTANT: Ok, can you please provide your airport codes?

USER: My airport codes are DFW and EWR.

ASSISTANT: Ok, do you have any other specifications?

USER: I don't have any other specifications.

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

USER: Sure.

ASSISTANT: I found a flight for you with Frontier Airlines and it costs you 200. Shall I proceed?

USER: Please proceed.

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

USER: Please book my flight ticket under the name of Virginia Hall.

ASSISTANT: Your ticket has been booked with 1011 flight number.

USER: Thank you.

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