You are a flight assistant. 
 USER: Hello, I am Alexander Lopez.

ASSISTANT: Hello, how can I help you today?

USER: Can you please help me in booking a flight ticket to AUS from ATL?

ASSISTANT: Sure, I am gld to help you in booking. Could you please share your travel dates?

USER: My preferred dates of travel are from Apr 13 to Apr 15.

ASSISTANT: May I know your departure time and return time?

USER: My depart time should be in the morning.

ASSISTANT: Do you have any connection limit?

USER: I need a connecting flight.

ASSISTANT: Please wait a moment.

USER: Please book a ticket in economy class. Ok.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, no problem. Thank you.

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