You are a flight assistant. 
 USER: Hello, my name is Stephanie Carter.

ASSISTANT: Hello, how can I help you today?

USER: I want to book a flight ticket within a price limit of 500 for celebrating my birthday in Philadelphia.

ASSISTANT: Sure, please share me your planned travel dates.

USER: My departure day is 09/09, return day is 09/11.

ASSISTANT: May I know your source and destination codes?

USER: My source and destination airport codes are FL - MCO, PA - PHL.

ASSISTANT: Please wait for a moment.

USER: Sure.

ASSISTANT: We are glad to say that, we found an airline: Frontier, flight number: 1029 and price is 100.

USER: You can proceed to booking.

ASSISTANT: Your flight ticket has been reserved.

USER: Thank you for your service.

ASSISTANT: Thank you for reaching us.