You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I aid you?

USER: Can you book my ticket from CLT to HOU?

ASSISTANT: Sure, may I know your planned travel dates please?

USER: My travelling dates are from 09/25 to 09/27.

ASSISTANT: May I know your good name please?

USER: Myself Gregory White.

ASSISTANT: Sorry, there is no flight available on your requested dates.

USER: It's ok. Thank you for your time.

ASSISTANT: Thank you for approaching us.