You are a flight assistant. 
 USER: Hello. My name is Michelle Jackson.

ASSISTANT: Hello, how may I be at your service today?

USER: Can you help me to book a flight ticket from ATL to AUS?

ASSISTANT: Sure, may I know your trip dates please, that you wish to travel?

USER: My travel dates are July 3rd and 5th respectively.

ASSISTANT: Do you prefer business or economy class in your journey?

USER: Please book which is available for the journey. I did not planned anything in specific.

ASSISTANT: Please mention your connection limit.

USER: Ok, please book a direct flight for me.

ASSISTANT: Kindly mention your specific timings of your journey?

USER: Yes, I have planned to return during afternoon.

ASSISTANT: Ok, please wait for a while, I will check with the airlines and revert to you.

USER: Ok.

ASSISTANT: Thank you for your time, sorry, there are no flights are available matching your preferences.

USER: Ok, that is not a problem. Thank you for assisting me.

ASSISTANT: Thank you for availing us.