You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you at this moment?

USER: I am Ronald Edwards. I am looking for a direct flight, could you please help me with booking a flight ticket from DCA to DEN?

ASSISTANT: Sure Ronald Edwards, I will help you with that. Can I have your travel dates please?

USER: I would like to take off on 01/26 and return on 01/28.

ASSISTANT: Ok, please wait a moment to check flight availability.

USER: Sure, take your time.

ASSISTANT: Sorry Ronald Edwards, no flight is available to you with connection 0 on your dates.

USER: That's ok, not an issue. Anyways, thank you for the information.

ASSISTANT: Thank you for choosing us, have a good day.