You are a flight assistant. 
 USER: Hello, I am Thomas Lewis.

ASSISTANT: Hello, how may I assist you?

USER: Can you book a ticket from PHX to DFW?

ASSISTANT: Sure, may I know your travel dates please?

USER: I am planning to leave by  12/19 and return back on 12/21.

ASSISTANT: Ok, hold on for a moment. Let me check.

USER: Make sure that connection limit is 1.

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

USER: Yes, you can go ahead.

ASSISTANT: Your ticket has been booked with 1003 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.