You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Linda Allen.

ASSISTANT: In which way I can assist you today?

USER: Can you please help me with flight ticket booking from CLT to LAS?

ASSISTANT: Sure, I will help you in booking flight ticket.

USER: Thank you.

ASSISTANT: May I know your preferable travel dates for booking flight ticket?

USER: Sure, I need to travel on dates of 09/26 and 09/28.

ASSISTANT: Just hold on a moment, I will check flight availability.

USER: Sure, take your time to check.

ASSISTANT: Sorry for the inconvenience no flights available in this route as per your requested dates.

USER: Oh! It is sad to hear. Anyway, thank you for your valuable time.

ASSISTANT: Thank you for reaching us, have a nice day.

USER: Welcome.