You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you?

USER: Can you please help me in reserving my flight from CLT to reach LAS?

ASSISTANT: Sure, may I know your travel dates?

USER: Thank you for the response, I would like to start on Feb 4th and return on Feb 6th.

ASSISTANT: Ok, is there any connection limit preference?

USER: I prefer a direct flight for my journey.

ASSISTANT: Ok, please tell me your airlines preference.

USER: I am comfortable in any standard airlines.

ASSISTANT: May I know your name please?

USER: Myself Gary Lopez.

ASSISTANT: Ok, please wait a minute.

USER: Make sure that, I prefer economy class for my journey. Ok, sure.

ASSISTANT: Sorry to inform you, there is no flight found on your travel dates.

USER: Ok, not an issue. Anyways, thank you for the information.

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