You are a flight assistant. 
 USER: Hi.

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

USER: Can you help me to book a flight ticket from LAS to CLT?

ASSISTANT: Sure, I am happy to help you with that. Can I have your travel dates please?

USER: June, 30 and July, 2 are my journey dates.

ASSISTANT: Ok, please let me know your  preferable timings of your journey.

USER: I am flexible with any timings.

ASSISTANT: Do you have any other specifications?

USER: I need direct flight.

ASSISTANT: Can I have your good name please?

USER: David Jones here.

ASSISTANT: Sorry to inform you that no direct flight is available to you on your planned dates.

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

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