You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Nicholas Parker here.

ASSISTANT: Can you please tell me how may I guide you?

USER: Can you book a direct flight to Las Vegas for my business trip?

ASSISTANT: Yes Nicholas Parker, I am happy to help you with that. Could you please help me with the travel dates?

USER: Yes, my travel dates are from June 22 to June 24.

ASSISTANT: Ok, may I know your origin and destination airport codes please?

USER: The airport codes for the journey are from DEN to LAS.

ASSISTANT: Ok, can I know your airlines preference?

USER: That does not matter.

ASSISTANT: Ok, please hold on for a minute. I will check the flight availability and let you know the flight details.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no direct flight found in this route on the dates you have given.

USER: Ok, that is not a problem.

ASSISTANT: Thank you for your positive response.

USER: Thank you.

ASSISTANT: You are welcome. Thank you for consulting us.