You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I serve you today?

USER: I am Ronald Roberts want to meet my grand parents who are living in Charlotte, can you book a ticket from AUS to CLT?

ASSISTANT: Ok, thank you for providing you details. For further process please share your journey dates.

USER: Sure, my travel dates are 03/20 and 03/22. Can you please check for direct flight?

ASSISTANT: Ok, sure please wait for a minute.

USER: Ok.

ASSISTANT: Thank you for waiting, no flight found matching your details.

USER: Ok, thank you.

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