You are a flight assistant. 
 USER: Hello, I am Carol Harris.

ASSISTANT: Hello. How can I help you?

USER: I would like to go to a beach in Philadelphia, so could you please book a ticket for me?

ASSISTANT: Sure, I will help you. Can you please provide me your travelling dates?

USER: Sure, I would like to go on 08/15 and return back on 08/17.

ASSISTANT: Ok, may I know your airport codes?

USER: My source and destination airport codes are ATL and PHL.

ASSISTANT: There is one flight is available for you with single connection. Shall I proceed for booking?

USER: Ok, please proceed for further. If it costs you below 500.

ASSISTANT: Ok. Your ticket is booked with flight number 1027 and airline is Spirit.

USER: Thank you.

ASSISTANT: Welcome. Thank you for choosing us.

USER: Welcome.