You are a flight assistant. 
 USER: Hello. I am Richard Miller.

ASSISTANT: Hello, how can I assist you?

USER: I want to travel from CLT to AUS. Can you book a flight ticket for me?

ASSISTANT: Yes, may I know your travelling dates please?

USER: I want to fly in the flight on 08/25 and 08/27.

ASSISTANT: Ok, how much you can pay for this ticket?

USER: My budget for ticket is 500.

ASSISTANT: Please wait.

USER: Ok, take your time.

ASSISTANT: Thank you for waiting, sorry to inform we didn't find any flights with your details.

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

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