You are a flight assistant. 
 USER: Hello.

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

USER: I am Richard Adams, want to travel from IAH to CLT. Please help me.

ASSISTANT: Sure, I am happy to aid you in booking flight ticket. Could you please mention your preferable travel dates for booking flight ticket?

USER: My travel dates are from 02/22 to 02/24.

ASSISTANT: Please hold on a moment, I will check flight availability in this route as per your requested dates.

USER: Ok.

ASSISTANT: Sorry no flights are available in this route as per your requested dates.

USER: It's ok, thank you.

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