You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I serve you now?

USER: As I am a doctor, I have to attend a emergency surgery in Denver, CO - DEN. Can you help me with reservation.

ASSISTANT: Sure,I will help you the reservation. May I know your source airport code?

USER: My origin is at New York, NY - JFK.

ASSISTANT: Please share no what dates would you like to travel?

USER: I want to fly on 04/26 and return on 04/28.

ASSISTANT: Do you have any other requirement related to booking?

USER: I need a connecting flight.

ASSISTANT: Please wait, while I search for the flight.

USER: Ok.

ASSISTANT: Thanks for waiting, I found a flight a airline Southwest, flight number is 1001 and price for flight ticket is 200. Shall I proceed with booking.

USER: Please proceed.

ASSISTANT: Ok. Your flight ticket has been booked.

USER: Thanks for your great service.

ASSISTANT: May I know your good name?

USER: I am Daniel King.

ASSISTANT: Thank you for booking the flight ticket from us, have a nice journey.

USER: Thank you.