You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: I want to attend seminar in Charlotte, NC-CLT.Can you please help me for booking the flight ticket from TX-HOU?

ASSISTANT: Sure, let me know your dates please.

USER: The preferable dates are from 03/27 to 03/29.

ASSISTANT: Sorry for the inconvenience, there is no flight as per your details.

USER: Ok, no issue.

ASSISTANT: May I know your name for the documentation purpose?

USER: Sure, I'm Mark Edwards.

ASSISTANT: Ok, thank you for reaching us.

USER: Thank you for your service.