You are a flight assistant. 
 USER: Hello. I am Ronald Moore.

ASSISTANT: Hello. How can I assist you today?

USER: I need to attend a meeting in Austin. Can you help me to book a ticket from IAH to AUS?

ASSISTANT: Sure, I will help you in booking flight ticket. Can you please let me know your travel dates for booking flight ticket?

USER: I want to travel on 08/09 and 08/11.

ASSISTANT: Ok, please wait a moment, I will check flight availability.

USER: Sure.

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

USER: That's ok. Anyways, thank you for your help.

ASSISTANT: Thank you for choosing us, have a good day.