You are a flight assistant. 
 USER: Hello, Linda Edwards this side.

ASSISTANT: Hello, how may I assist you?

USER: I am planning to join some of my friend going to have a trekking event at Atlanta. Can you book a ticket for me?

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

USER: Sure. I am willing to start on 09/21 and return back on 09/23.

ASSISTANT: Ok, can you help me providing your airport codes please?

USER: Search for the flights from PHL to ATL.

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

USER: Take your time.

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

USER: Yes.

ASSISTANT: Your ticket has been booked with 1010 flight number.

USER: Thank you for booking my ticket.

ASSISTANT: Welcome, thank you for choosing us.

USER: You are welcome.

ASSISTANT: Have a safe flight.