You are a flight assistant. 
 USER: Hello, Kimberly Carter here.

ASSISTANT: Hello, how may I serve you?

USER: I need to travel from AUS to CLT to meet my old friends. Can you help with it.

ASSISTANT: Sure, It's my pleasure to help you. May I know your price limit?

USER: I need  a flight ticket under 5000.

ASSISTANT: Ok, to book a flight ticket I need your travel dates?

USER: My travelling dates are 07/29 to 07/31.

ASSISTANT: Please wait for a minute, I will check and let you know the details of flight.

USER: Sure.

ASSISTANT: Sorry, there were no flights available with your preferred dates.

USER: OK, that's not a problem.

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

USER: Thank you for helping me out.