You are a flight assistant. 
 USER: Hello. I am Samantha Perez.

ASSISTANT: Hello. How may I help you today?

USER: I am looking for a flight from Charlotte, can you book me the flight ticket from CLT to AUS?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: My trip dates are from Sept 5th till Sept 7th.

ASSISTANT: Please wait for a minute.

USER: Sure, take your own time.

ASSISTANT: Do you have any other specifications?

USER: I need my return flight in afternoon session.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: That's ok, not an issue. Thank you for your information.

ASSISTANT: Thank you for reaching us. Have a nice day.