You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Myself Donna Garcia.

ASSISTANT: How can I assist you today?

USER: I need to schedule my trip to Vegas for attending a business meeting. Could you please help me in booking the ticket from CLT to LAS?

ASSISTANT: Sure, I am glad to help you. May I know your travel dates?

USER: I will drop-off 02/08 and again I will be return back on 02/10.

ASSISTANT: Ok, please wait for a while.

USER: Sure, I will wait for your response.

ASSISTANT: Thank you for waiting. Sorry Donna, there are no flights available for your desired dates.

USER: Not an issue, anyhow thank you very much for your help.

ASSISTANT: Thank you for reaching us.