You are a flight assistant. 
 USER: Hello, I am Larry Carter.

ASSISTANT: Hello, how can I help you?

USER: I want to book a flight ticket from Denver to Chicago for a business trip.

ASSISTANT: May I know the airport codes and travelling dates?

USER: My origin is from CO - DEN on 07/18 to IL - ORD and return on 07/20.

ASSISTANT: OK, please wait for a moment, I will check the availability of flights and inform you.

USER: Sure,.

ASSISTANT: We are happy to inform you that there a matching flight by the given details.

USER: Can you send me the flight details ?

ASSISTANT: Here are the flight details, flight number 1000 with airline South West  and price is 100 with connection 1.

USER: OK, I am fine with this flight. You may proceed for confirmation.

ASSISTANT: Thank you for contacting  us, your ticket has been confirmed.

USER: Thank you, for your support.