You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I serve you at this time?

USER: I am Elizabeth Davis, I want to book a flight ticket in the dates of 10/16 and 10/18 to have a round trip in Denver.

ASSISTANT: Sure, may I know your regional airport codes of your trip?

USER: Sure, as I would like to have a round trip so my source and destination are same DEN.

ASSISTANT: I found a connecting flight in Spirit airlines on your trip dates, can I proceed?

USER: Yes, please proceed with the booking.

ASSISTANT: Ok, the ticket has reserved in 1013 flight number with a fare of 500. Enjoy your flight trip.

USER: Thank you for booking my flight ticket.

ASSISTANT: Welcome.