You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, How can I assist you today?

USER: I need to reach Denver - DEN, to attend a business conference on Sept 18. Can you help me to book a flight ticket?

ASSISTANT: Sure, I am here to help you.

USER: Thank you.

ASSISTANT: Can you provide me your origin airport?

USER: Washington - DCA, is the origin airport code.

ASSISTANT: When did you plan to return?

USER: I intend to return on Sept 20.

ASSISTANT: Do you prefer any connections in your journey?

USER: Yes, I prefer a connecting flight.

ASSISTANT: On which name, do I reserve the ticket?

USER: Please reserve it on my name, Raymond Wilson.

ASSISTANT: Ok, Please be on hold.

USER: Sure.

ASSISTANT: Thanks for your time, we found a flight of Hawaiian airlines available for your journey.

USER: Perfect, proceed for booking.

ASSISTANT: Your ticket is reserved in flight 1006.

USER: Thanks for your service.

ASSISTANT: Thanks for your presence. Have a safe journey.